Finding the Fourth Proportional to 2,981.32, 4,458.54 and 2,278.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.32 : 4,458.54 = 2,278.72 : x
2. Step 2: Convert to fraction form
   2,981.32/4,458.54 = 2,278.72/x
3. Step 3: Cross multiply
   2,981.32x = 4,458.54 × 2,278.72
4. Step 4: Simplify right side
   2,981.32x = 10,159,764.27
5. Step 5: Solve for x
   x = 10,159,764.27/2,981.32
6. Step 6: Final answer
   x = 3,407.81