Finding the Fourth Proportional to 1,551,978,636.56, 2,141,410,802.52 and 891,801,368.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551,978,636.56 : 2,141,410,802.52 = 891,801,368.72 : x
2. Step 2: Convert to fraction form
   1,551,978,636.56/2,141,410,802.52 = 891,801,368.72/x
3. Step 3: Cross multiply
   1,551,978,636.56x = 2,141,410,802.52 × 891,801,368.72
4. Step 4: Simplify right side
   1,551,978,636.56x = 1,909,713,084,679,129,600
5. Step 5: Solve for x
   x = 1,909,713,084,679,129,600/1,551,978,636.56
6. Step 6: Final answer
   x = 1,230,502,172.96