Finding the Fourth Proportional to 99,563.72, 137,403.06 and 54,851.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,563.72 : 137,403.06 = 54,851.72 : x
2. Step 2: Convert to fraction form
   99,563.72/137,403.06 = 54,851.72/x
3. Step 3: Cross multiply
   99,563.72x = 137,403.06 × 54,851.72
4. Step 4: Simplify right side
   99,563.72x = 7,536,794,174.26
5. Step 5: Solve for x
   x = 7,536,794,174.26/99,563.72
6. Step 6: Final answer
   x = 75,698.20