Finding the Fourth Proportional to 16,071.60, 24,109.20 and 4,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,071.60 : 24,109.20 = 4,978.20 : x
2. Step 2: Convert to fraction form
   16,071.60/24,109.20 = 4,978.20/x
3. Step 3: Cross multiply
   16,071.60x = 24,109.20 × 4,978.20
4. Step 4: Simplify right side
   16,071.60x = 120,020,419.44
5. Step 5: Solve for x
   x = 120,020,419.44/16,071.60
6. Step 6: Final answer
   x = 7,467.86