Finding the Fourth Proportional to 42,339.16, 63,570.30 and 31,141.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,339.16 : 63,570.30 = 31,141.72 : x
2. Step 2: Convert to fraction form
   42,339.16/63,570.30 = 31,141.72/x
3. Step 3: Cross multiply
   42,339.16x = 63,570.30 × 31,141.72
4. Step 4: Simplify right side
   42,339.16x = 1,979,688,482.92
5. Step 5: Solve for x
   x = 1,979,688,482.92/42,339.16
6. Step 6: Final answer
   x = 46,757.86