Finding the Fourth Proportional to 1,870.74, 2,806.89 and 775.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,806.89 = 775.35 : x
2. Step 2: Convert to fraction form
   1,870.74/2,806.89 = 775.35/x
3. Step 3: Cross multiply
   1,870.74x = 2,806.89 × 775.35
4. Step 4: Simplify right side
   1,870.74x = 2,176,322.16
5. Step 5: Solve for x
   x = 2,176,322.16/1,870.74
6. Step 6: Final answer
   x = 1,163.35