Finding the Fourth Proportional to 99,513.50, 137,328.64 and 54,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,513.50 : 137,328.64 = 54,801.50 : x
2. Step 2: Convert to fraction form
   99,513.50/137,328.64 = 54,801.50/x
3. Step 3: Cross multiply
   99,513.50x = 137,328.64 × 54,801.50
4. Step 4: Simplify right side
   99,513.50x = 7,525,815,464.96
5. Step 5: Solve for x
   x = 7,525,815,464.96/99,513.50
6. Step 6: Final answer
   x = 75,626.08