Finding the Fourth Proportional to 1,404.40, 1,937.69 and 906.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.40 : 1,937.69 = 906.85 : x
2. Step 2: Convert to fraction form
   1,404.40/1,937.69 = 906.85/x
3. Step 3: Cross multiply
   1,404.40x = 1,937.69 × 906.85
4. Step 4: Simplify right side
   1,404.40x = 1,757,189.64
5. Step 5: Solve for x
   x = 1,757,189.64/1,404.40
6. Step 6: Final answer
   x = 1,251.21