Finding the Fourth Proportional to 1,426.92, 2,139.96 and 906.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.92 : 2,139.96 = 906.18 : x
2. Step 2: Convert to fraction form
   1,426.92/2,139.96 = 906.18/x
3. Step 3: Cross multiply
   1,426.92x = 2,139.96 × 906.18
4. Step 4: Simplify right side
   1,426.92x = 1,939,188.95
5. Step 5: Solve for x
   x = 1,939,188.95/1,426.92
6. Step 6: Final answer
   x = 1,359.00