Finding the Fourth Proportional to 12,709.77, 17,540.13 and 7,045.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,709.77 : 17,540.13 = 7,045.12 : x
2. Step 2: Convert to fraction form
   12,709.77/17,540.13 = 7,045.12/x
3. Step 3: Cross multiply
   12,709.77x = 17,540.13 × 7,045.12
4. Step 4: Simplify right side
   12,709.77x = 123,572,320.67
5. Step 5: Solve for x
   x = 123,572,320.67/12,709.77
6. Step 6: Final answer
   x = 9,722.62