Finding the Fourth Proportional to 1,551,978,922.68, 2,141,411,196.78 and 891,801,654.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551,978,922.68 : 2,141,411,196.78 = 891,801,654.84 : x
2. Step 2: Convert to fraction form
   1,551,978,922.68/2,141,411,196.78 = 891,801,654.84/x
3. Step 3: Cross multiply
   1,551,978,922.68x = 2,141,411,196.78 × 891,801,654.84
4. Step 4: Simplify right side
   1,551,978,922.68x = 1,909,714,048,981,308,928
5. Step 5: Solve for x
   x = 1,909,714,048,981,308,928/1,551,978,922.68
6. Step 6: Final answer
   x = 1,230,502,567.45