Finding the Fourth Proportional to 1,054.30, 1,455.06 and 612.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,054.30 : 1,455.06 = 612.22 : x
2. Step 2: Convert to fraction form
   1,054.30/1,455.06 = 612.22/x
3. Step 3: Cross multiply
   1,054.30x = 1,455.06 × 612.22
4. Step 4: Simplify right side
   1,054.30x = 890,816.83
5. Step 5: Solve for x
   x = 890,816.83/1,054.30
6. Step 6: Final answer
   x = 844.94