Finding the Fourth Proportional to 1,426.30, 2,139.78 and 604.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.30 : 2,139.78 = 604.61 : x
2. Step 2: Convert to fraction form
   1,426.30/2,139.78 = 604.61/x
3. Step 3: Cross multiply
   1,426.30x = 2,139.78 × 604.61
4. Step 4: Simplify right side
   1,426.30x = 1,293,721.69
5. Step 5: Solve for x
   x = 1,293,721.69/1,426.30
6. Step 6: Final answer
   x = 907.05