Finding the Fourth Proportional to 42,478.30, 58,635.96 and 31,898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,478.30 : 58,635.96 = 31,898.50 : x
2. Step 2: Convert to fraction form
   42,478.30/58,635.96 = 31,898.50/x
3. Step 3: Cross multiply
   42,478.30x = 58,635.96 × 31,898.50
4. Step 4: Simplify right side
   42,478.30x = 1,870,399,170.06
5. Step 5: Solve for x
   x = 1,870,399,170.06/42,478.30
6. Step 6: Final answer
   x = 44,031.87