Finding the Fourth Proportional to 1,688.29, 2,330.91 and 1,100.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688.29 : 2,330.91 = 1,100.50 : x
2. Step 2: Convert to fraction form
   1,688.29/2,330.91 = 1,100.50/x
3. Step 3: Cross multiply
   1,688.29x = 2,330.91 × 1,100.50
4. Step 4: Simplify right side
   1,688.29x = 2,565,166.46
5. Step 5: Solve for x
   x = 2,565,166.46/1,688.29
6. Step 6: Final answer
   x = 1,519.39