Finding the Fourth Proportional to 1,395.95, 1,926.37 and 766.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.95 : 1,926.37 = 766.47 : x
2. Step 2: Convert to fraction form
   1,395.95/1,926.37 = 766.47/x
3. Step 3: Cross multiply
   1,395.95x = 1,926.37 × 766.47
4. Step 4: Simplify right side
   1,395.95x = 1,476,502.90
5. Step 5: Solve for x
   x = 1,476,502.90/1,395.95
6. Step 6: Final answer
   x = 1,057.71