Finding the Fourth Proportional to 31,132.84, 42,963.42 and 16,985.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,132.84 : 42,963.42 = 16,985.98 : x
2. Step 2: Convert to fraction form
   31,132.84/42,963.42 = 16,985.98/x
3. Step 3: Cross multiply
   31,132.84x = 42,963.42 × 16,985.98
4. Step 4: Simplify right side
   31,132.84x = 729,775,792.85
5. Step 5: Solve for x
   x = 729,775,792.85/31,132.84
6. Step 6: Final answer
   x = 23,440.71