Finding the Fourth Proportional to 1,426.20, 2,139.59 and 732.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.20 : 2,139.59 = 732.30 : x
2. Step 2: Convert to fraction form
   1,426.20/2,139.59 = 732.30/x
3. Step 3: Cross multiply
   1,426.20x = 2,139.59 × 732.30
4. Step 4: Simplify right side
   1,426.20x = 1,566,818.10
5. Step 5: Solve for x
   x = 1,566,818.10/1,426.20
6. Step 6: Final answer
   x = 1,098.60