Finding the Fourth Proportional to 11,315.91, 16,979.46 and 7,570.17

Step by Step Solution

1. Step 1: Write the proportion equation
   11,315.91 : 16,979.46 = 7,570.17 : x
2. Step 2: Convert to fraction form
   11,315.91/16,979.46 = 7,570.17/x
3. Step 3: Cross multiply
   11,315.91x = 16,979.46 × 7,570.17
4. Step 4: Simplify right side
   11,315.91x = 128,537,398.71
5. Step 5: Solve for x
   x = 128,537,398.71/11,315.91
6. Step 6: Final answer
   x = 11,359.00