Finding the Fourth Proportional to 1,055.01, 1,455.89 and 612.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.01 : 1,455.89 = 612.95 : x
2. Step 2: Convert to fraction form
   1,055.01/1,455.89 = 612.95/x
3. Step 3: Cross multiply
   1,055.01x = 1,455.89 × 612.95
4. Step 4: Simplify right side
   1,055.01x = 892,387.78
5. Step 5: Solve for x
   x = 892,387.78/1,055.01
6. Step 6: Final answer
   x = 845.86