Finding the Fourth Proportional to 1,315.47, 1,972.15 and 903.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.47 : 1,972.15 = 903.37 : x
2. Step 2: Convert to fraction form
   1,315.47/1,972.15 = 903.37/x
3. Step 3: Cross multiply
   1,315.47x = 1,972.15 × 903.37
4. Step 4: Simplify right side
   1,315.47x = 1,781,581.15
5. Step 5: Solve for x
   x = 1,781,581.15/1,315.47
6. Step 6: Final answer
   x = 1,354.33