Finding the Fourth Proportional to 99,532.28, 137,354.55 and 54,820.28

Step by Step Solution

1. Step 1: Write the proportion equation
   99,532.28 : 137,354.55 = 54,820.28 : x
2. Step 2: Convert to fraction form
   99,532.28/137,354.55 = 54,820.28/x
3. Step 3: Cross multiply
   99,532.28x = 137,354.55 × 54,820.28
4. Step 4: Simplify right side
   99,532.28x = 7,529,814,890.27
5. Step 5: Solve for x
   x = 7,529,814,890.27/99,532.28
6. Step 6: Final answer
   x = 75,651.99