Finding the Fourth Proportional to 1,066.40, 1,598.52 and 578.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.40 : 1,598.52 = 578.42 : x
2. Step 2: Convert to fraction form
   1,066.40/1,598.52 = 578.42/x
3. Step 3: Cross multiply
   1,066.40x = 1,598.52 × 578.42
4. Step 4: Simplify right side
   1,066.40x = 924,615.94
5. Step 5: Solve for x
   x = 924,615.94/1,066.40
6. Step 6: Final answer
   x = 867.04