Finding the Fourth Proportional to 16,985.31, 25,363.59 and 13,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,985.31 : 25,363.59 = 13,871.50 : x
2. Step 2: Convert to fraction form
   16,985.31/25,363.59 = 13,871.50/x
3. Step 3: Cross multiply
   16,985.31x = 25,363.59 × 13,871.50
4. Step 4: Simplify right side
   16,985.31x = 351,830,877.19
5. Step 5: Solve for x
   x = 351,830,877.19/16,985.31
6. Step 6: Final answer
   x = 20,713.83