Finding the Fourth Proportional to 1,380.32, 1,903.54 and 907.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.32 : 1,903.54 = 907.38 : x
2. Step 2: Convert to fraction form
   1,380.32/1,903.54 = 907.38/x
3. Step 3: Cross multiply
   1,380.32x = 1,903.54 × 907.38
4. Step 4: Simplify right side
   1,380.32x = 1,727,234.13
5. Step 5: Solve for x
   x = 1,727,234.13/1,380.32
6. Step 6: Final answer
   x = 1,251.33