Finding the Fourth Proportional to 99,592.72, 137,443.08 and 54,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,592.72 : 137,443.08 = 54,880.72 : x
2. Step 2: Convert to fraction form
   99,592.72/137,443.08 = 54,880.72/x
3. Step 3: Cross multiply
   99,592.72x = 137,443.08 × 54,880.72
4. Step 4: Simplify right side
   99,592.72x = 7,542,975,189.42
5. Step 5: Solve for x
   x = 7,542,975,189.42/99,592.72
6. Step 6: Final answer
   x = 75,738.22