Finding the Fourth Proportional to 1,056.08, 1,457.30 and 608.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.08 : 1,457.30 = 608.02 : x
2. Step 2: Convert to fraction form
   1,056.08/1,457.30 = 608.02/x
3. Step 3: Cross multiply
   1,056.08x = 1,457.30 × 608.02
4. Step 4: Simplify right side
   1,056.08x = 886,067.55
5. Step 5: Solve for x
   x = 886,067.55/1,056.08
6. Step 6: Final answer
   x = 839.02