Finding the Fourth Proportional to 31,016.84, 42,803.10 and 16,869.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.84 : 42,803.10 = 16,869.70 : x
2. Step 2: Convert to fraction form
   31,016.84/42,803.10 = 16,869.70/x
3. Step 3: Cross multiply
   31,016.84x = 42,803.10 × 16,869.70
4. Step 4: Simplify right side
   31,016.84x = 722,075,456.07
5. Step 5: Solve for x
   x = 722,075,456.07/31,016.84
6. Step 6: Final answer
   x = 23,280.11