Finding the Fourth Proportional to 142,280.55, 213,432.98 and 42,434.28

Step by Step Solution

1. Step 1: Write the proportion equation
   142,280.55 : 213,432.98 = 42,434.28 : x
2. Step 2: Convert to fraction form
   142,280.55/213,432.98 = 42,434.28/x
3. Step 3: Cross multiply
   142,280.55x = 213,432.98 × 42,434.28
4. Step 4: Simplify right side
   142,280.55x = 9,056,874,622.38
5. Step 5: Solve for x
   x = 9,056,874,622.38/142,280.55
6. Step 6: Final answer
   x = 63,655.04