Finding the Fourth Proportional to 1,604.72, 2,214.46 and 906.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.72 : 2,214.46 = 906.10 : x
2. Step 2: Convert to fraction form
   1,604.72/2,214.46 = 906.10/x
3. Step 3: Cross multiply
   1,604.72x = 2,214.46 × 906.10
4. Step 4: Simplify right side
   1,604.72x = 2,006,522.21
5. Step 5: Solve for x
   x = 2,006,522.21/1,604.72
6. Step 6: Final answer
   x = 1,250.39