Finding the Fourth Proportional to 11,654.21, 16,088.88 and 9,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,654.21 : 16,088.88 = 9,061.40 : x
2. Step 2: Convert to fraction form
   11,654.21/16,088.88 = 9,061.40/x
3. Step 3: Cross multiply
   11,654.21x = 16,088.88 × 9,061.40
4. Step 4: Simplify right side
   11,654.21x = 145,787,696.79
5. Step 5: Solve for x
   x = 145,787,696.79/11,654.21
6. Step 6: Final answer
   x = 12,509.45