Finding the Fourth Proportional to 14,978.94, 20,670.18 and 9,009.42

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.94 : 20,670.18 = 9,009.42 : x
2. Step 2: Convert to fraction form
   14,978.94/20,670.18 = 9,009.42/x
3. Step 3: Cross multiply
   14,978.94x = 20,670.18 × 9,009.42
4. Step 4: Simplify right side
   14,978.94x = 186,226,333.10
5. Step 5: Solve for x
   x = 186,226,333.10/14,978.94
6. Step 6: Final answer
   x = 12,432.54