Finding the Fourth Proportional to 31,016.56, 42,802.41 and 16,869.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.56 : 42,802.41 = 16,869.10 : x
2. Step 2: Convert to fraction form
   31,016.56/42,802.41 = 16,869.10/x
3. Step 3: Cross multiply
   31,016.56x = 42,802.41 × 16,869.10
4. Step 4: Simplify right side
   31,016.56x = 722,038,134.53
5. Step 5: Solve for x
   x = 722,038,134.53/31,016.56
6. Step 6: Final answer
   x = 23,279.12