Finding the Fourth Proportional to 14,978.90, 22,469.60 and 5,118.86

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.90 : 22,469.60 = 5,118.86 : x
2. Step 2: Convert to fraction form
   14,978.90/22,469.60 = 5,118.86/x
3. Step 3: Cross multiply
   14,978.90x = 22,469.60 × 5,118.86
4. Step 4: Simplify right side
   14,978.90x = 115,018,637.11
5. Step 5: Solve for x
   x = 115,018,637.11/14,978.90
6. Step 6: Final answer
   x = 7,678.71