Finding the Fourth Proportional to 1,354.89, 1,866.85 and 912.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.89 : 1,866.85 = 912.03 : x
2. Step 2: Convert to fraction form
   1,354.89/1,866.85 = 912.03/x
3. Step 3: Cross multiply
   1,354.89x = 1,866.85 × 912.03
4. Step 4: Simplify right side
   1,354.89x = 1,702,613.92
5. Step 5: Solve for x
   x = 1,702,613.92/1,354.89
6. Step 6: Final answer
   x = 1,256.64