Finding the Fourth Proportional to 1,345.52, 1,857.52 and 905.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.52 : 1,857.52 = 905.74 : x
2. Step 2: Convert to fraction form
   1,345.52/1,857.52 = 905.74/x
3. Step 3: Cross multiply
   1,345.52x = 1,857.52 × 905.74
4. Step 4: Simplify right side
   1,345.52x = 1,682,430.16
5. Step 5: Solve for x
   x = 1,682,430.16/1,345.52
6. Step 6: Final answer
   x = 1,250.39