Finding the Fourth Proportional to 1,109.31, 1,663.49 and 608.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109.31 : 1,663.49 = 608.87 : x
2. Step 2: Convert to fraction form
   1,109.31/1,663.49 = 608.87/x
3. Step 3: Cross multiply
   1,109.31x = 1,663.49 × 608.87
4. Step 4: Simplify right side
   1,109.31x = 1,012,849.16
5. Step 5: Solve for x
   x = 1,012,849.16/1,109.31
6. Step 6: Final answer
   x = 913.04