Finding the Fourth Proportional to 7,449.12, 11,152.80 and 3,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,449.12 : 11,152.80 = 3,978.72 : x
2. Step 2: Convert to fraction form
   7,449.12/11,152.80 = 3,978.72/x
3. Step 3: Cross multiply
   7,449.12x = 11,152.80 × 3,978.72
4. Step 4: Simplify right side
   7,449.12x = 44,373,868.42
5. Step 5: Solve for x
   x = 44,373,868.42/7,449.12
6. Step 6: Final answer
   x = 5,956.93