Finding the Fourth Proportional to 99,982.50, 137,992.59 and 57,533.10

Step by Step Solution

1. Step 1: Write the proportion equation
   99,982.50 : 137,992.59 = 57,533.10 : x
2. Step 2: Convert to fraction form
   99,982.50/137,992.59 = 57,533.10/x
3. Step 3: Cross multiply
   99,982.50x = 137,992.59 × 57,533.10
4. Step 4: Simplify right side
   99,982.50x = 7,939,141,479.73
5. Step 5: Solve for x
   x = 7,939,141,479.73/99,982.50
6. Step 6: Final answer
   x = 79,405.31