Finding the Fourth Proportional to 12,710.70, 17,540.89 and 7,045.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,710.70 : 17,540.89 = 7,045.57 : x
2. Step 2: Convert to fraction form
   12,710.70/17,540.89 = 7,045.57/x
3. Step 3: Cross multiply
   12,710.70x = 17,540.89 × 7,045.57
4. Step 4: Simplify right side
   12,710.70x = 123,585,445.43
5. Step 5: Solve for x
   x = 123,585,445.43/12,710.70
6. Step 6: Final answer
   x = 9,722.95