Finding the Fourth Proportional to 99,729.50, 137,556.23 and 59,412.15

Step by Step Solution

1. Step 1: Write the proportion equation
   99,729.50 : 137,556.23 = 59,412.15 : x
2. Step 2: Convert to fraction form
   99,729.50/137,556.23 = 59,412.15/x
3. Step 3: Cross multiply
   99,729.50x = 137,556.23 × 59,412.15
4. Step 4: Simplify right side
   99,729.50x = 8,172,511,073.13
5. Step 5: Solve for x
   x = 8,172,511,073.13/99,729.50
6. Step 6: Final answer
   x = 81,946.78