Finding the Fourth Proportional to 14,978.42, 20,670.17 and 8,264.47

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.42 : 20,670.17 = 8,264.47 : x
2. Step 2: Convert to fraction form
   14,978.42/20,670.17 = 8,264.47/x
3. Step 3: Cross multiply
   14,978.42x = 20,670.17 × 8,264.47
4. Step 4: Simplify right side
   14,978.42x = 170,827,906.86
5. Step 5: Solve for x
   x = 170,827,906.86/14,978.42
6. Step 6: Final answer
   x = 11,404.93