Finding the Fourth Proportional to 1,401.30, 1,933.88 and 771.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.30 : 1,933.88 = 771.83 : x
2. Step 2: Convert to fraction form
   1,401.30/1,933.88 = 771.83/x
3. Step 3: Cross multiply
   1,401.30x = 1,933.88 × 771.83
4. Step 4: Simplify right side
   1,401.30x = 1,492,620.32
5. Step 5: Solve for x
   x = 1,492,620.32/1,401.30
6. Step 6: Final answer
   x = 1,065.17