Finding the Fourth Proportional to 42,457.29, 63,625.59 and 31,276.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,457.29 : 63,625.59 = 31,276.05 : x
2. Step 2: Convert to fraction form
   42,457.29/63,625.59 = 31,276.05/x
3. Step 3: Cross multiply
   42,457.29x = 63,625.59 × 31,276.05
4. Step 4: Simplify right side
   42,457.29x = 1,989,957,134.12
5. Step 5: Solve for x
   x = 1,989,957,134.12/42,457.29
6. Step 6: Final answer
   x = 46,869.62