Finding the Fourth Proportional to 1,551,978,906.18, 2,141,411,174.10 and 891,801,638.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551,978,906.18 : 2,141,411,174.10 = 891,801,638.34 : x
2. Step 2: Convert to fraction form
   1,551,978,906.18/2,141,411,174.10 = 891,801,638.34/x
3. Step 3: Cross multiply
   1,551,978,906.18x = 2,141,411,174.10 × 891,801,638.34
4. Step 4: Simplify right side
   1,551,978,906.18x = 1,909,713,993,421,963,008
5. Step 5: Solve for x
   x = 1,909,713,993,421,963,008/1,551,978,906.18
6. Step 6: Final answer
   x = 1,230,502,544.73