Finding the Fourth Proportional to 1,048.39, 1,570.17 and 608.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.39 : 1,570.17 = 608.55 : x
2. Step 2: Convert to fraction form
   1,048.39/1,570.17 = 608.55/x
3. Step 3: Cross multiply
   1,048.39x = 1,570.17 × 608.55
4. Step 4: Simplify right side
   1,048.39x = 955,526.95
5. Step 5: Solve for x
   x = 955,526.95/1,048.39
6. Step 6: Final answer
   x = 911.42