Finding the Fourth Proportional to 1,303.50, 1,798.55 and 772.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,303.50 : 1,798.55 = 772.55 : x
2. Step 2: Convert to fraction form
   1,303.50/1,798.55 = 772.55/x
3. Step 3: Cross multiply
   1,303.50x = 1,798.55 × 772.55
4. Step 4: Simplify right side
   1,303.50x = 1,389,467.55
5. Step 5: Solve for x
   x = 1,389,467.55/1,303.50
6. Step 6: Final answer
   x = 1,065.95