Finding the Fourth Proportional to 1,401.16, 1,933.72 and 771.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.16 : 1,933.72 = 771.81 : x
2. Step 2: Convert to fraction form
   1,401.16/1,933.72 = 771.81/x
3. Step 3: Cross multiply
   1,401.16x = 1,933.72 × 771.81
4. Step 4: Simplify right side
   1,401.16x = 1,492,464.43
5. Step 5: Solve for x
   x = 1,492,464.43/1,401.16
6. Step 6: Final answer
   x = 1,065.16