Finding the Fourth Proportional to 9,678.27, 14,479.59 and 8,498.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,678.27 : 14,479.59 = 8,498.91 : x
2. Step 2: Convert to fraction form
   9,678.27/14,479.59 = 8,498.91/x
3. Step 3: Cross multiply
   9,678.27x = 14,479.59 × 8,498.91
4. Step 4: Simplify right side
   9,678.27x = 123,060,732.25
5. Step 5: Solve for x
   x = 123,060,732.25/9,678.27
6. Step 6: Final answer
   x = 12,715.16