Finding the Fourth Proportional to 1,606.50, 2,217.15 and 907.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,606.50 : 2,217.15 = 907.92 : x
2. Step 2: Convert to fraction form
   1,606.50/2,217.15 = 907.92/x
3. Step 3: Cross multiply
   1,606.50x = 2,217.15 × 907.92
4. Step 4: Simplify right side
   1,606.50x = 2,012,994.83
5. Step 5: Solve for x
   x = 2,012,994.83/1,606.50
6. Step 6: Final answer
   x = 1,253.03