Finding the Fourth Proportional to 1,351.30, 1,864.83 and 761.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.30 : 1,864.83 = 761.80 : x
2. Step 2: Convert to fraction form
   1,351.30/1,864.83 = 761.80/x
3. Step 3: Cross multiply
   1,351.30x = 1,864.83 × 761.80
4. Step 4: Simplify right side
   1,351.30x = 1,420,627.49
5. Step 5: Solve for x
   x = 1,420,627.49/1,351.30
6. Step 6: Final answer
   x = 1,051.30