Finding the Fourth Proportional to 1,351.32, 1,864.83 and 885.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,351.32 : 1,864.83 = 885.57 : x
2. Step 2: Convert to fraction form
   1,351.32/1,864.83 = 885.57/x
3. Step 3: Cross multiply
   1,351.32x = 1,864.83 × 885.57
4. Step 4: Simplify right side
   1,351.32x = 1,651,437.50
5. Step 5: Solve for x
   x = 1,651,437.50/1,351.32
6. Step 6: Final answer
   x = 1,222.09