Finding the Fourth Proportional to 11,109.78, 15,333.17 and 6,393.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,109.78 : 15,333.17 = 6,393.15 : x
2. Step 2: Convert to fraction form
   11,109.78/15,333.17 = 6,393.15/x
3. Step 3: Cross multiply
   11,109.78x = 15,333.17 × 6,393.15
4. Step 4: Simplify right side
   11,109.78x = 98,027,223.82
5. Step 5: Solve for x
   x = 98,027,223.82/11,109.78
6. Step 6: Final answer
   x = 8,823.51