Finding the Fourth Proportional to 1,055.90, 1,457.49 and 724.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.90 : 1,457.49 = 724.82 : x
2. Step 2: Convert to fraction form
   1,055.90/1,457.49 = 724.82/x
3. Step 3: Cross multiply
   1,055.90x = 1,457.49 × 724.82
4. Step 4: Simplify right side
   1,055.90x = 1,056,410.61
5. Step 5: Solve for x
   x = 1,056,410.61/1,055.90
6. Step 6: Final answer
   x = 1,000.49