Finding the Fourth Proportional to 1,401.87, 1,934.56 and 772.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.87 : 1,934.56 = 772.38 : x
2. Step 2: Convert to fraction form
   1,401.87/1,934.56 = 772.38/x
3. Step 3: Cross multiply
   1,401.87x = 1,934.56 × 772.38
4. Step 4: Simplify right side
   1,401.87x = 1,494,213.52
5. Step 5: Solve for x
   x = 1,494,213.52/1,401.87
6. Step 6: Final answer
   x = 1,065.87