Finding the Fourth Proportional to 1,428.15, 1,970.04 and 903.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.15 : 1,970.04 = 903.27 : x
2. Step 2: Convert to fraction form
   1,428.15/1,970.04 = 903.27/x
3. Step 3: Cross multiply
   1,428.15x = 1,970.04 × 903.27
4. Step 4: Simplify right side
   1,428.15x = 1,779,478.03
5. Step 5: Solve for x
   x = 1,779,478.03/1,428.15
6. Step 6: Final answer
   x = 1,246.00