Finding the Fourth Proportional to 1,054.42, 1,455.59 and 612.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.42 : 1,455.59 = 612.24 : x
2. Step 2: Convert to fraction form
   1,054.42/1,455.59 = 612.24/x
3. Step 3: Cross multiply
   1,054.42x = 1,455.59 × 612.24
4. Step 4: Simplify right side
   1,054.42x = 891,164.67
5. Step 5: Solve for x
   x = 891,164.67/1,054.42
6. Step 6: Final answer
   x = 845.17