Finding the Fourth Proportional to 1,909.59, 2,863.71 and 610.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.59 : 2,863.71 = 610.71 : x
2. Step 2: Convert to fraction form
   1,909.59/2,863.71 = 610.71/x
3. Step 3: Cross multiply
   1,909.59x = 2,863.71 × 610.71
4. Step 4: Simplify right side
   1,909.59x = 1,748,896.33
5. Step 5: Solve for x
   x = 1,748,896.33/1,909.59
6. Step 6: Final answer
   x = 915.85