Finding the Fourth Proportional to 1,535.52, 2,118.32 and 905.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,535.52 : 2,118.32 = 905.62 : x
2. Step 2: Convert to fraction form
   1,535.52/2,118.32 = 905.62/x
3. Step 3: Cross multiply
   1,535.52x = 2,118.32 × 905.62
4. Step 4: Simplify right side
   1,535.52x = 1,918,392.96
5. Step 5: Solve for x
   x = 1,918,392.96/1,535.52
6. Step 6: Final answer
   x = 1,249.34