Finding the Fourth Proportional to 1,379.61, 1,903.87 and 750.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.61 : 1,903.87 = 750.15 : x
2. Step 2: Convert to fraction form
   1,379.61/1,903.87 = 750.15/x
3. Step 3: Cross multiply
   1,379.61x = 1,903.87 × 750.15
4. Step 4: Simplify right side
   1,379.61x = 1,428,189.02
5. Step 5: Solve for x
   x = 1,428,189.02/1,379.61
6. Step 6: Final answer
   x = 1,035.21