Finding the Fourth Proportional to 1,379.24, 1,903.31 and 749.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.24 : 1,903.31 = 749.76 : x
2. Step 2: Convert to fraction form
   1,379.24/1,903.31 = 749.76/x
3. Step 3: Cross multiply
   1,379.24x = 1,903.31 × 749.76
4. Step 4: Simplify right side
   1,379.24x = 1,427,025.71
5. Step 5: Solve for x
   x = 1,427,025.71/1,379.24
6. Step 6: Final answer
   x = 1,034.65