Finding the Fourth Proportional to 1,066.10, 1,598.91 and 407.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.10 : 1,598.91 = 407.73 : x
2. Step 2: Convert to fraction form
   1,066.10/1,598.91 = 407.73/x
3. Step 3: Cross multiply
   1,066.10x = 1,598.91 × 407.73
4. Step 4: Simplify right side
   1,066.10x = 651,928.04
5. Step 5: Solve for x
   x = 651,928.04/1,066.10
6. Step 6: Final answer
   x = 611.51