Finding the Fourth Proportional to 1,054.17, 1,454.49 and 612.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.17 : 1,454.49 = 612.09 : x
2. Step 2: Convert to fraction form
   1,054.17/1,454.49 = 612.09/x
3. Step 3: Cross multiply
   1,054.17x = 1,454.49 × 612.09
4. Step 4: Simplify right side
   1,054.17x = 890,278.78
5. Step 5: Solve for x
   x = 890,278.78/1,054.17
6. Step 6: Final answer
   x = 844.53