Finding the Fourth Proportional to 12,088.09, 16,671.94 and 9,988.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,088.09 : 16,671.94 = 9,988.57 : x
2. Step 2: Convert to fraction form
   12,088.09/16,671.94 = 9,988.57/x
3. Step 3: Cross multiply
   12,088.09x = 16,671.94 × 9,988.57
4. Step 4: Simplify right side
   12,088.09x = 166,528,839.73
5. Step 5: Solve for x
   x = 166,528,839.73/12,088.09
6. Step 6: Final answer
   x = 13,776.27