Finding the Fourth Proportional to 2,688.18, 3,704.82 and 1,988.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.18 : 3,704.82 = 1,988.34 : x
2. Step 2: Convert to fraction form
   2,688.18/3,704.82 = 1,988.34/x
3. Step 3: Cross multiply
   2,688.18x = 3,704.82 × 1,988.34
4. Step 4: Simplify right side
   2,688.18x = 7,366,441.80
5. Step 5: Solve for x
   x = 7,366,441.80/2,688.18
6. Step 6: Final answer
   x = 2,740.31