Finding the Fourth Proportional to 1,379.91, 1,903.30 and 937.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.91 : 1,903.30 = 937.05 : x
2. Step 2: Convert to fraction form
   1,379.91/1,903.30 = 937.05/x
3. Step 3: Cross multiply
   1,379.91x = 1,903.30 × 937.05
4. Step 4: Simplify right side
   1,379.91x = 1,783,487.27
5. Step 5: Solve for x
   x = 1,783,487.27/1,379.91
6. Step 6: Final answer
   x = 1,292.47