Finding the Fourth Proportional to 1,395.18, 1,925.38 and 765.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.18 : 1,925.38 = 765.72 : x
2. Step 2: Convert to fraction form
   1,395.18/1,925.38 = 765.72/x
3. Step 3: Cross multiply
   1,395.18x = 1,925.38 × 765.72
4. Step 4: Simplify right side
   1,395.18x = 1,474,301.97
5. Step 5: Solve for x
   x = 1,474,301.97/1,395.18
6. Step 6: Final answer
   x = 1,056.71