Finding the Fourth Proportional to 2,071.80, 3,106.98 and 610.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.80 : 3,106.98 = 610.56 : x
2. Step 2: Convert to fraction form
   2,071.80/3,106.98 = 610.56/x
3. Step 3: Cross multiply
   2,071.80x = 3,106.98 × 610.56
4. Step 4: Simplify right side
   2,071.80x = 1,896,997.71
5. Step 5: Solve for x
   x = 1,896,997.71/2,071.80
6. Step 6: Final answer
   x = 915.63