Finding the Fourth Proportional to 729,055,131.18, 1,006,096,080.87 and 399,030,270.18

Step by Step Solution

1. Step 1: Write the proportion equation
   729,055,131.18 : 1,006,096,080.87 = 399,030,270.18 : x
2. Step 2: Convert to fraction form
   729,055,131.18/1,006,096,080.87 = 399,030,270.18/x
3. Step 3: Cross multiply
   729,055,131.18x = 1,006,096,080.87 × 399,030,270.18
4. Step 4: Simplify right side
   729,055,131.18x = 401,462,790,976,595,264
5. Step 5: Solve for x
   x = 401,462,790,976,595,264/729,055,131.18
6. Step 6: Final answer
   x = 550,661,772.76