Finding the Fourth Proportional to 99,606.72, 137,462.40 and 54,894.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,606.72 : 137,462.40 = 54,894.72 : x
2. Step 2: Convert to fraction form
   99,606.72/137,462.40 = 54,894.72/x
3. Step 3: Cross multiply
   99,606.72x = 137,462.40 × 54,894.72
4. Step 4: Simplify right side
   99,606.72x = 7,545,959,958.53
5. Step 5: Solve for x
   x = 7,545,959,958.53/99,606.72
6. Step 6: Final answer
   x = 75,757.54