Finding the Fourth Proportional to 410,634,269.72, 615,951,411.72 and 99,739,790.79

Step by Step Solution

1. Step 1: Write the proportion equation
   410,634,269.72 : 615,951,411.72 = 99,739,790.79 : x
2. Step 2: Convert to fraction form
   410,634,269.72/615,951,411.72 = 99,739,790.79/x
3. Step 3: Cross multiply
   410,634,269.72x = 615,951,411.72 × 99,739,790.79
4. Step 4: Simplify right side
   410,634,269.72x = 61,434,864,941,757,960
5. Step 5: Solve for x
   x = 61,434,864,941,757,960/410,634,269.72
6. Step 6: Final answer
   x = 149,609,687.92