Finding the Fourth Proportional to 12,778.27, 17,634.01 and 7,112.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.27 : 17,634.01 = 7,112.89 : x
2. Step 2: Convert to fraction form
   12,778.27/17,634.01 = 7,112.89/x
3. Step 3: Cross multiply
   12,778.27x = 17,634.01 × 7,112.89
4. Step 4: Simplify right side
   12,778.27x = 125,428,773.39
5. Step 5: Solve for x
   x = 125,428,773.39/12,778.27
6. Step 6: Final answer
   x = 9,815.79