Finding the Fourth Proportional to 2,986.59, 4,479.89 and 906.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,986.59 : 4,479.89 = 906.61 : x
2. Step 2: Convert to fraction form
   2,986.59/4,479.89 = 906.61/x
3. Step 3: Cross multiply
   2,986.59x = 4,479.89 × 906.61
4. Step 4: Simplify right side
   2,986.59x = 4,061,510.84
5. Step 5: Solve for x
   x = 4,061,510.84/2,986.59
6. Step 6: Final answer
   x = 1,359.92