Finding the Fourth Proportional to 11,689.16, 17,499.18 and 7,058.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,689.16 : 17,499.18 = 7,058.12 : x
2. Step 2: Convert to fraction form
   11,689.16/17,499.18 = 7,058.12/x
3. Step 3: Cross multiply
   11,689.16x = 17,499.18 × 7,058.12
4. Step 4: Simplify right side
   11,689.16x = 123,511,312.34
5. Step 5: Solve for x
   x = 123,511,312.34/11,689.16
6. Step 6: Final answer
   x = 10,566.31