Finding the Fourth Proportional to 516,613,003.02, 774,922,358.61 and 128,435,833.89

Step by Step Solution

1. Step 1: Write the proportion equation
   516,613,003.02 : 774,922,358.61 = 128,435,833.89 : x
2. Step 2: Convert to fraction form
   516,613,003.02/774,922,358.61 = 128,435,833.89/x
3. Step 3: Cross multiply
   516,613,003.02x = 774,922,358.61 × 128,435,833.89
4. Step 4: Simplify right side
   516,613,003.02x = 99,527,799,328,080,976
5. Step 5: Solve for x
   x = 99,527,799,328,080,976/516,613,003.02
6. Step 6: Final answer
   x = 192,654,460.39