Finding the Fourth Proportional to 1,401.13, 1,933.56 and 771.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.13 : 1,933.56 = 771.66 : x
2. Step 2: Convert to fraction form
   1,401.13/1,933.56 = 771.66/x
3. Step 3: Cross multiply
   1,401.13x = 1,933.56 × 771.66
4. Step 4: Simplify right side
   1,401.13x = 1,492,046.56
5. Step 5: Solve for x
   x = 1,492,046.56/1,401.13
6. Step 6: Final answer
   x = 1,064.89