Finding the Fourth Proportional to 9,987.50, 14,905.31 and 8,880.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.50 : 14,905.31 = 8,880.37 : x
2. Step 2: Convert to fraction form
   9,987.50/14,905.31 = 8,880.37/x
3. Step 3: Cross multiply
   9,987.50x = 14,905.31 × 8,880.37
4. Step 4: Simplify right side
   9,987.50x = 132,364,586.10
5. Step 5: Solve for x
   x = 132,364,586.10/9,987.50
6. Step 6: Final answer
   x = 13,253.02