Finding the Fourth Proportional to 1,071.70, 1,605.82 and 608.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071.70 : 1,605.82 = 608.10 : x
2. Step 2: Convert to fraction form
   1,071.70/1,605.82 = 608.10/x
3. Step 3: Cross multiply
   1,071.70x = 1,605.82 × 608.10
4. Step 4: Simplify right side
   1,071.70x = 976,499.14
5. Step 5: Solve for x
   x = 976,499.14/1,071.70
6. Step 6: Final answer
   x = 911.17