Finding the Fourth Proportional to 12,776.42, 17,632.12 and 7,111.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.42 : 17,632.12 = 7,111.18 : x
2. Step 2: Convert to fraction form
   12,776.42/17,632.12 = 7,111.18/x
3. Step 3: Cross multiply
   12,776.42x = 17,632.12 × 7,111.18
4. Step 4: Simplify right side
   12,776.42x = 125,385,179.10
5. Step 5: Solve for x
   x = 125,385,179.10/12,776.42
6. Step 6: Final answer
   x = 9,813.80