Finding the Fourth Proportional to 31,016.61, 42,803.37 and 16,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.61 : 42,803.37 = 16,869.50 : x
2. Step 2: Convert to fraction form
   31,016.61/42,803.37 = 16,869.50/x
3. Step 3: Cross multiply
   31,016.61x = 42,803.37 × 16,869.50
4. Step 4: Simplify right side
   31,016.61x = 722,071,236.20
5. Step 5: Solve for x
   x = 722,071,236.20/31,016.61
6. Step 6: Final answer
   x = 23,280.15