Finding the Fourth Proportional to 11,492.78, 15,859.82 and 6,388.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,492.78 : 15,859.82 = 6,388.61 : x
2. Step 2: Convert to fraction form
   11,492.78/15,859.82 = 6,388.61/x
3. Step 3: Cross multiply
   11,492.78x = 15,859.82 × 6,388.61
4. Step 4: Simplify right side
   11,492.78x = 101,322,141.32
5. Step 5: Solve for x
   x = 101,322,141.32/11,492.78
6. Step 6: Final answer
   x = 8,816.16