Finding the Fourth Proportional to 2,978.40, 4,465.02 and 1,248.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,978.40 : 4,465.02 = 1,248.24 : x
2. Step 2: Convert to fraction form
   2,978.40/4,465.02 = 1,248.24/x
3. Step 3: Cross multiply
   2,978.40x = 4,465.02 × 1,248.24
4. Step 4: Simplify right side
   2,978.40x = 5,573,416.56
5. Step 5: Solve for x
   x = 5,573,416.56/2,978.40
6. Step 6: Final answer
   x = 1,871.28