Finding the Fourth Proportional to 1,870.55, 2,806.83 and 775.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.55 : 2,806.83 = 775.67 : x
2. Step 2: Convert to fraction form
   1,870.55/2,806.83 = 775.67/x
3. Step 3: Cross multiply
   1,870.55x = 2,806.83 × 775.67
4. Step 4: Simplify right side
   1,870.55x = 2,177,159.79
5. Step 5: Solve for x
   x = 2,177,159.79/1,870.55
6. Step 6: Final answer
   x = 1,163.92