Finding the Fourth Proportional to 42,456.29, 63,624.09 and 31,275.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,456.29 : 63,624.09 = 31,275.05 : x
2. Step 2: Convert to fraction form
   42,456.29/63,624.09 = 31,275.05/x
3. Step 3: Cross multiply
   42,456.29x = 63,624.09 × 31,275.05
4. Step 4: Simplify right side
   42,456.29x = 1,989,846,755.01
5. Step 5: Solve for x
   x = 1,989,846,755.01/42,456.29
6. Step 6: Final answer
   x = 46,868.12