Finding the Fourth Proportional to 99,488,080.58, 137,293,835.56 and 57,680,270.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,488,080.58 : 137,293,835.56 = 57,680,270.78 : x
2. Step 2: Convert to fraction form
   99,488,080.58/137,293,835.56 = 57,680,270.78/x
3. Step 3: Cross multiply
   99,488,080.58x = 137,293,835.56 × 57,680,270.78
4. Step 4: Simplify right side
   99,488,080.58x = 7,919,145,610,694,923
5. Step 5: Solve for x
   x = 7,919,145,610,694,923/99,488,080.58
6. Step 6: Final answer
   x = 79,598,938.54