Finding the Fourth Proportional to 1,345.32, 1,857.17 and 903.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.32 : 1,857.17 = 903.53 : x
2. Step 2: Convert to fraction form
   1,345.32/1,857.17 = 903.53/x
3. Step 3: Cross multiply
   1,345.32x = 1,857.17 × 903.53
4. Step 4: Simplify right side
   1,345.32x = 1,678,015.71
5. Step 5: Solve for x
   x = 1,678,015.71/1,345.32
6. Step 6: Final answer
   x = 1,247.30