Finding the Fourth Proportional to 90,083.52, 135,049.80 and 42,671.52

Step by Step Solution

1. Step 1: Write the proportion equation
   90,083.52 : 135,049.80 = 42,671.52 : x
2. Step 2: Convert to fraction form
   90,083.52/135,049.80 = 42,671.52/x
3. Step 3: Cross multiply
   90,083.52x = 135,049.80 × 42,671.52
4. Step 4: Simplify right side
   90,083.52x = 5,762,780,241.70
5. Step 5: Solve for x
   x = 5,762,780,241.70/90,083.52
6. Step 6: Final answer
   x = 63,971.53