Finding the Fourth Proportional to 1,055.89, 1,457.29 and 613.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.89 : 1,457.29 = 613.83 : x
2. Step 2: Convert to fraction form
   1,055.89/1,457.29 = 613.83/x
3. Step 3: Cross multiply
   1,055.89x = 1,457.29 × 613.83
4. Step 4: Simplify right side
   1,055.89x = 894,528.32
5. Step 5: Solve for x
   x = 894,528.32/1,055.89
6. Step 6: Final answer
   x = 847.18