Finding the Fourth Proportional to 99,563.85, 137,416.91 and 57,150.09

Step by Step Solution

1. Step 1: Write the proportion equation
   99,563.85 : 137,416.91 = 57,150.09 : x
2. Step 2: Convert to fraction form
   99,563.85/137,416.91 = 57,150.09/x
3. Step 3: Cross multiply
   99,563.85x = 137,416.91 × 57,150.09
4. Step 4: Simplify right side
   99,563.85x = 7,853,388,488.27
5. Step 5: Solve for x
   x = 7,853,388,488.27/99,563.85
6. Step 6: Final answer
   x = 78,877.91