Finding the Fourth Proportional to 468,231,767.52, 646,129,536.56 and 256,538,308.02

Step by Step Solution

1. Step 1: Write the proportion equation
   468,231,767.52 : 646,129,536.56 = 256,538,308.02 : x
2. Step 2: Convert to fraction form
   468,231,767.52/646,129,536.56 = 256,538,308.02/x
3. Step 3: Cross multiply
   468,231,767.52x = 646,129,536.56 × 256,538,308.02
4. Step 4: Simplify right side
   468,231,767.52x = 165,756,978,070,849,120
5. Step 5: Solve for x
   x = 165,756,978,070,849,120/468,231,767.52
6. Step 6: Final answer
   x = 354,006,262.64