Finding the Fourth Proportional to 99,513.16, 137,321.94 and 54,801.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,513.16 : 137,321.94 = 54,801.16 : x
2. Step 2: Convert to fraction form
   99,513.16/137,321.94 = 54,801.16/x
3. Step 3: Cross multiply
   99,513.16x = 137,321.94 × 54,801.16
4. Step 4: Simplify right side
   99,513.16x = 7,525,401,605.45
5. Step 5: Solve for x
   x = 7,525,401,605.45/99,513.16
6. Step 6: Final answer
   x = 75,622.18