Finding the Fourth Proportional to 1,648.32, 2,275.36 and 1,059.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,648.32 : 2,275.36 = 1,059.20 : x
2. Step 2: Convert to fraction form
   1,648.32/2,275.36 = 1,059.20/x
3. Step 3: Cross multiply
   1,648.32x = 2,275.36 × 1,059.20
4. Step 4: Simplify right side
   1,648.32x = 2,410,061.31
5. Step 5: Solve for x
   x = 2,410,061.31/1,648.32
6. Step 6: Final answer
   x = 1,462.13