Finding the Fourth Proportional to 1,099.89, 1,517.81 and 657.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.89 : 1,517.81 = 657.53 : x
2. Step 2: Convert to fraction form
   1,099.89/1,517.81 = 657.53/x
3. Step 3: Cross multiply
   1,099.89x = 1,517.81 × 657.53
4. Step 4: Simplify right side
   1,099.89x = 998,005.61
5. Step 5: Solve for x
   x = 998,005.61/1,099.89
6. Step 6: Final answer
   x = 907.37