Finding the Fourth Proportional to 2,380.78, 3,572.64 and 1,148.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.78 : 3,572.64 = 1,148.31 : x
2. Step 2: Convert to fraction form
   2,380.78/3,572.64 = 1,148.31/x
3. Step 3: Cross multiply
   2,380.78x = 3,572.64 × 1,148.31
4. Step 4: Simplify right side
   2,380.78x = 4,102,498.24
5. Step 5: Solve for x
   x = 4,102,498.24/2,380.78
6. Step 6: Final answer
   x = 1,723.17