Finding the Fourth Proportional to 1,426.44, 2,139.50 and 1,061.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.44 : 2,139.50 = 1,061.80 : x
2. Step 2: Convert to fraction form
   1,426.44/2,139.50 = 1,061.80/x
3. Step 3: Cross multiply
   1,426.44x = 2,139.50 × 1,061.80
4. Step 4: Simplify right side
   1,426.44x = 2,271,721.10
5. Step 5: Solve for x
   x = 2,271,721.10/1,426.44
6. Step 6: Final answer
   x = 1,592.58