Finding the Fourth Proportional to 1,066.50, 1,598.94 and 578.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.50 : 1,598.94 = 578.88 : x
2. Step 2: Convert to fraction form
   1,066.50/1,598.94 = 578.88/x
3. Step 3: Cross multiply
   1,066.50x = 1,598.94 × 578.88
4. Step 4: Simplify right side
   1,066.50x = 925,594.39
5. Step 5: Solve for x
   x = 925,594.39/1,066.50
6. Step 6: Final answer
   x = 867.88