Finding the Fourth Proportional to 1,401.62, 1,934.18 and 772.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.62 : 1,934.18 = 772.16 : x
2. Step 2: Convert to fraction form
   1,401.62/1,934.18 = 772.16/x
3. Step 3: Cross multiply
   1,401.62x = 1,934.18 × 772.16
4. Step 4: Simplify right side
   1,401.62x = 1,493,496.43
5. Step 5: Solve for x
   x = 1,493,496.43/1,401.62
6. Step 6: Final answer
   x = 1,065.55