Finding the Fourth Proportional to 1,395.31, 1,925.53 and 774.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.31 : 1,925.53 = 774.31 : x
2. Step 2: Convert to fraction form
   1,395.31/1,925.53 = 774.31/x
3. Step 3: Cross multiply
   1,395.31x = 1,925.53 × 774.31
4. Step 4: Simplify right side
   1,395.31x = 1,490,957.13
5. Step 5: Solve for x
   x = 1,490,957.13/1,395.31
6. Step 6: Final answer
   x = 1,068.55