Finding the Fourth Proportional to 10,691.82, 14,758.82 and 9,570.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,691.82 : 14,758.82 = 9,570.78 : x
2. Step 2: Convert to fraction form
   10,691.82/14,758.82 = 9,570.78/x
3. Step 3: Cross multiply
   10,691.82x = 14,758.82 × 9,570.78
4. Step 4: Simplify right side
   10,691.82x = 141,253,419.28
5. Step 5: Solve for x
   x = 141,253,419.28/10,691.82
6. Step 6: Final answer
   x = 13,211.35