Finding the Fourth Proportional to 42,479.30, 58,637.34 and 31,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,479.30 : 58,637.34 = 31,899.50 : x
2. Step 2: Convert to fraction form
   42,479.30/58,637.34 = 31,899.50/x
3. Step 3: Cross multiply
   42,479.30x = 58,637.34 × 31,899.50
4. Step 4: Simplify right side
   42,479.30x = 1,870,501,827.33
5. Step 5: Solve for x
   x = 1,870,501,827.33/42,479.30
6. Step 6: Final answer
   x = 44,033.25