Finding the Fourth Proportional to 12,700.21, 17,526.27 and 7,111.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.21 : 17,526.27 = 7,111.21 : x
2. Step 2: Convert to fraction form
   12,700.21/17,526.27 = 7,111.21/x
3. Step 3: Cross multiply
   12,700.21x = 17,526.27 × 7,111.21
4. Step 4: Simplify right side
   12,700.21x = 124,632,986.49
5. Step 5: Solve for x
   x = 124,632,986.49/12,700.21
6. Step 6: Final answer
   x = 9,813.46