Finding the Fourth Proportional to 9,417.10, 13,026.54 and 8,778.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,417.10 : 13,026.54 = 8,778.82 : x
2. Step 2: Convert to fraction form
   9,417.10/13,026.54 = 8,778.82/x
3. Step 3: Cross multiply
   9,417.10x = 13,026.54 × 8,778.82
4. Step 4: Simplify right side
   9,417.10x = 114,357,649.88
5. Step 5: Solve for x
   x = 114,357,649.88/9,417.10
6. Step 6: Final answer
   x = 12,143.62