Finding the Fourth Proportional to 1,688.76, 2,329.69 and 1,099.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.76 : 2,329.69 = 1,099.08 : x
2. Step 2: Convert to fraction form
   1,688.76/2,329.69 = 1,099.08/x
3. Step 3: Cross multiply
   1,688.76x = 2,329.69 × 1,099.08
4. Step 4: Simplify right side
   1,688.76x = 2,560,515.69
5. Step 5: Solve for x
   x = 2,560,515.69/1,688.76
6. Step 6: Final answer
   x = 1,516.21