Finding the Fourth Proportional to 2,071.62, 3,107.01 and 610.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.62 : 3,107.01 = 610.80 : x
2. Step 2: Convert to fraction form
   2,071.62/3,107.01 = 610.80/x
3. Step 3: Cross multiply
   2,071.62x = 3,107.01 × 610.80
4. Step 4: Simplify right side
   2,071.62x = 1,897,761.71
5. Step 5: Solve for x
   x = 1,897,761.71/2,071.62
6. Step 6: Final answer
   x = 916.08