Finding the Fourth Proportional to 1,054.34, 1,455.10 and 612.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.34 : 1,455.10 = 612.24 : x
2. Step 2: Convert to fraction form
   1,054.34/1,455.10 = 612.24/x
3. Step 3: Cross multiply
   1,054.34x = 1,455.10 × 612.24
4. Step 4: Simplify right side
   1,054.34x = 890,870.42
5. Step 5: Solve for x
   x = 890,870.42/1,054.34
6. Step 6: Final answer
   x = 844.96