Finding the Fourth Proportional to 1,380.76, 1,905.47 and 751.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.76 : 1,905.47 = 751.29 : x
2. Step 2: Convert to fraction form
   1,380.76/1,905.47 = 751.29/x
3. Step 3: Cross multiply
   1,380.76x = 1,905.47 × 751.29
4. Step 4: Simplify right side
   1,380.76x = 1,431,567.42
5. Step 5: Solve for x
   x = 1,431,567.42/1,380.76
6. Step 6: Final answer
   x = 1,036.79