Finding the Fourth Proportional to 42,013.57, 57,978.45 and 23,150.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,013.57 : 57,978.45 = 23,150.70 : x
2. Step 2: Convert to fraction form
   42,013.57/57,978.45 = 23,150.70/x
3. Step 3: Cross multiply
   42,013.57x = 57,978.45 × 23,150.70
4. Step 4: Simplify right side
   42,013.57x = 1,342,241,702.42
5. Step 5: Solve for x
   x = 1,342,241,702.42/42,013.57
6. Step 6: Final answer
   x = 31,947.81