Finding the Fourth Proportional to 1,401.20, 1,934.95 and 904.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.20 : 1,934.95 = 904.69 : x
2. Step 2: Convert to fraction form
   1,401.20/1,934.95 = 904.69/x
3. Step 3: Cross multiply
   1,401.20x = 1,934.95 × 904.69
4. Step 4: Simplify right side
   1,401.20x = 1,750,529.92
5. Step 5: Solve for x
   x = 1,750,529.92/1,401.20
6. Step 6: Final answer
   x = 1,249.31