Finding the Fourth Proportional to 1,055.13, 1,455.72 and 613.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.13 : 1,455.72 = 613.19 : x
2. Step 2: Convert to fraction form
   1,055.13/1,455.72 = 613.19/x
3. Step 3: Cross multiply
   1,055.13x = 1,455.72 × 613.19
4. Step 4: Simplify right side
   1,055.13x = 892,625.67
5. Step 5: Solve for x
   x = 892,625.67/1,055.13
6. Step 6: Final answer
   x = 845.99