Finding the Fourth Proportional to 1,870.66, 2,806.71 and 717.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.66 : 2,806.71 = 717.22 : x
2. Step 2: Convert to fraction form
   1,870.66/2,806.71 = 717.22/x
3. Step 3: Cross multiply
   1,870.66x = 2,806.71 × 717.22
4. Step 4: Simplify right side
   1,870.66x = 2,013,028.55
5. Step 5: Solve for x
   x = 2,013,028.55/1,870.66
6. Step 6: Final answer
   x = 1,076.11