Finding the Fourth Proportional to 99,892.72, 137,845.84 and 54,561.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,892.72 : 137,845.84 = 54,561.52 : x
2. Step 2: Convert to fraction form
   99,892.72/137,845.84 = 54,561.52/x
3. Step 3: Cross multiply
   99,892.72x = 137,845.84 × 54,561.52
4. Step 4: Simplify right side
   99,892.72x = 7,521,078,556.08
5. Step 5: Solve for x
   x = 7,521,078,556.08/99,892.72
6. Step 6: Final answer
   x = 75,291.56