Finding the Fourth Proportional to 1,395.08, 1,925.12 and 765.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.08 : 1,925.12 = 765.57 : x
2. Step 2: Convert to fraction form
   1,395.08/1,925.12 = 765.57/x
3. Step 3: Cross multiply
   1,395.08x = 1,925.12 × 765.57
4. Step 4: Simplify right side
   1,395.08x = 1,473,810.29
5. Step 5: Solve for x
   x = 1,473,810.29/1,395.08
6. Step 6: Final answer
   x = 1,056.44