Finding the Fourth Proportional to 99,602.55, 137,451.55 and 54,280.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99,602.55 : 137,451.55 = 54,280.55 : x
2. Step 2: Convert to fraction form
   99,602.55/137,451.55 = 54,280.55/x
3. Step 3: Cross multiply
   99,602.55x = 137,451.55 × 54,280.55
4. Step 4: Simplify right side
   99,602.55x = 7,460,945,732.35
5. Step 5: Solve for x
   x = 7,460,945,732.35/99,602.55
6. Step 6: Final answer
   x = 74,907.18