Finding the Fourth Proportional to 99,771.53, 137,687.61 and 54,452.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,771.53 : 137,687.61 = 54,452.42 : x
2. Step 2: Convert to fraction form
   99,771.53/137,687.61 = 54,452.42/x
3. Step 3: Cross multiply
   99,771.53x = 137,687.61 × 54,452.42
4. Step 4: Simplify right side
   99,771.53x = 7,497,423,568.52
5. Step 5: Solve for x
   x = 7,497,423,568.52/99,771.53
6. Step 6: Final answer
   x = 75,145.92