Finding the Fourth Proportional to 1,367.57, 1,887.21 and 770.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.57 : 1,887.21 = 770.06 : x
2. Step 2: Convert to fraction form
   1,367.57/1,887.21 = 770.06/x
3. Step 3: Cross multiply
   1,367.57x = 1,887.21 × 770.06
4. Step 4: Simplify right side
   1,367.57x = 1,453,255.50
5. Step 5: Solve for x
   x = 1,453,255.50/1,367.57
6. Step 6: Final answer
   x = 1,062.66