Finding the Fourth Proportional to 1,395.56, 1,925.82 and 774.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.56 : 1,925.82 = 774.60 : x
2. Step 2: Convert to fraction form
   1,395.56/1,925.82 = 774.60/x
3. Step 3: Cross multiply
   1,395.56x = 1,925.82 × 774.60
4. Step 4: Simplify right side
   1,395.56x = 1,491,740.17
5. Step 5: Solve for x
   x = 1,491,740.17/1,395.56
6. Step 6: Final answer
   x = 1,068.92