Finding the Fourth Proportional to 1,079.92, 1,490.25 and 607.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.92 : 1,490.25 = 607.82 : x
2. Step 2: Convert to fraction form
   1,079.92/1,490.25 = 607.82/x
3. Step 3: Cross multiply
   1,079.92x = 1,490.25 × 607.82
4. Step 4: Simplify right side
   1,079.92x = 905,800.72
5. Step 5: Solve for x
   x = 905,800.72/1,079.92
6. Step 6: Final answer
   x = 838.77