Finding the Fourth Proportional to 1,909.62, 2,863.89 and 610.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,909.62 : 2,863.89 = 610.38 : x
2. Step 2: Convert to fraction form
   1,909.62/2,863.89 = 610.38/x
3. Step 3: Cross multiply
   1,909.62x = 2,863.89 × 610.38
4. Step 4: Simplify right side
   1,909.62x = 1,748,061.18
5. Step 5: Solve for x
   x = 1,748,061.18/1,909.62
6. Step 6: Final answer
   x = 915.40