Finding the Fourth Proportional to 1,379.32, 1,903.43 and 749.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.32 : 1,903.43 = 749.86 : x
2. Step 2: Convert to fraction form
   1,379.32/1,903.43 = 749.86/x
3. Step 3: Cross multiply
   1,379.32x = 1,903.43 × 749.86
4. Step 4: Simplify right side
   1,379.32x = 1,427,303.14
5. Step 5: Solve for x
   x = 1,427,303.14/1,379.32
6. Step 6: Final answer
   x = 1,034.79