Finding the Fourth Proportional to 1,870.56, 2,807.16 and 716.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.56 : 2,807.16 = 716.28 : x
2. Step 2: Convert to fraction form
   1,870.56/2,807.16 = 716.28/x
3. Step 3: Cross multiply
   1,870.56x = 2,807.16 × 716.28
4. Step 4: Simplify right side
   1,870.56x = 2,010,712.56
5. Step 5: Solve for x
   x = 2,010,712.56/1,870.56
6. Step 6: Final answer
   x = 1,074.93