Finding the Fourth Proportional to 99,564.10, 137,417.25 and 57,150.34

Step by Step Solution

1. Step 1: Write the proportion equation
   99,564.10 : 137,417.25 = 57,150.34 : x
2. Step 2: Convert to fraction form
   99,564.10/137,417.25 = 57,150.34/x
3. Step 3: Cross multiply
   99,564.10x = 137,417.25 × 57,150.34
4. Step 4: Simplify right side
   99,564.10x = 7,853,442,559.37
5. Step 5: Solve for x
   x = 7,853,442,559.37/99,564.10
6. Step 6: Final answer
   x = 78,878.26