Finding the Fourth Proportional to 1,021.83, 1,409.33 and 903.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021.83 : 1,409.33 = 903.93 : x
2. Step 2: Convert to fraction form
   1,021.83/1,409.33 = 903.93/x
3. Step 3: Cross multiply
   1,021.83x = 1,409.33 × 903.93
4. Step 4: Simplify right side
   1,021.83x = 1,273,931.15
5. Step 5: Solve for x
   x = 1,273,931.15/1,021.83
6. Step 6: Final answer
   x = 1,246.72