Finding the Fourth Proportional to 1,351.28, 1,864.78 and 761.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.28 : 1,864.78 = 761.83 : x
2. Step 2: Convert to fraction form
   1,351.28/1,864.78 = 761.83/x
3. Step 3: Cross multiply
   1,351.28x = 1,864.78 × 761.83
4. Step 4: Simplify right side
   1,351.28x = 1,420,632.21
5. Step 5: Solve for x
   x = 1,420,632.21/1,351.28
6. Step 6: Final answer
   x = 1,051.32