Finding the Fourth Proportional to 31,047.76, 42,844.17 and 16,899.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,047.76 : 42,844.17 = 16,899.76 : x
2. Step 2: Convert to fraction form
   31,047.76/42,844.17 = 16,899.76/x
3. Step 3: Cross multiply
   31,047.76x = 42,844.17 × 16,899.76
4. Step 4: Simplify right side
   31,047.76x = 724,056,190.40
5. Step 5: Solve for x
   x = 724,056,190.40/31,047.76
6. Step 6: Final answer
   x = 23,320.72