Finding the Fourth Proportional to 31,123.22, 46,687.68 and 12,398.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,123.22 : 46,687.68 = 12,398.72 : x
2. Step 2: Convert to fraction form
   31,123.22/46,687.68 = 12,398.72/x
3. Step 3: Cross multiply
   31,123.22x = 46,687.68 × 12,398.72
4. Step 4: Simplify right side
   31,123.22x = 578,867,471.77
5. Step 5: Solve for x
   x = 578,867,471.77/31,123.22
6. Step 6: Final answer
   x = 18,599.22