Finding the Fourth Proportional to 1,401.30, 1,934.21 and 903.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.30 : 1,934.21 = 903.92 : x
2. Step 2: Convert to fraction form
   1,401.30/1,934.21 = 903.92/x
3. Step 3: Cross multiply
   1,401.30x = 1,934.21 × 903.92
4. Step 4: Simplify right side
   1,401.30x = 1,748,363.69
5. Step 5: Solve for x
   x = 1,748,363.69/1,401.30
6. Step 6: Final answer
   x = 1,247.67