Finding the Fourth Proportional to 1,434.65, 1,978.83 and 903.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.65 : 1,978.83 = 903.02 : x
2. Step 2: Convert to fraction form
   1,434.65/1,978.83 = 903.02/x
3. Step 3: Cross multiply
   1,434.65x = 1,978.83 × 903.02
4. Step 4: Simplify right side
   1,434.65x = 1,786,913.17
5. Step 5: Solve for x
   x = 1,786,913.17/1,434.65
6. Step 6: Final answer
   x = 1,245.54