Finding the Fourth Proportional to 12,700.71, 17,526.96 and 7,111.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.71 : 17,526.96 = 7,111.71 : x
2. Step 2: Convert to fraction form
   12,700.71/17,526.96 = 7,111.71/x
3. Step 3: Cross multiply
   12,700.71x = 17,526.96 × 7,111.71
4. Step 4: Simplify right side
   12,700.71x = 124,646,656.70
5. Step 5: Solve for x
   x = 124,646,656.70/12,700.71
6. Step 6: Final answer
   x = 9,814.15