Finding the Fourth Proportional to 14,978.42, 20,670.38 and 8,264.28

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.42 : 20,670.38 = 8,264.28 : x
2. Step 2: Convert to fraction form
   14,978.42/20,670.38 = 8,264.28/x
3. Step 3: Cross multiply
   14,978.42x = 20,670.38 × 8,264.28
4. Step 4: Simplify right side
   14,978.42x = 170,825,808.03
5. Step 5: Solve for x
   x = 170,825,808.03/14,978.42
6. Step 6: Final answer
   x = 11,404.79