Finding the Fourth Proportional to 7,123.59, 10,685.79 and 2,740.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.59 : 10,685.79 = 2,740.50 : x
2. Step 2: Convert to fraction form
   7,123.59/10,685.79 = 2,740.50/x
3. Step 3: Cross multiply
   7,123.59x = 10,685.79 × 2,740.50
4. Step 4: Simplify right side
   7,123.59x = 29,284,407.50
5. Step 5: Solve for x
   x = 29,284,407.50/7,123.59
6. Step 6: Final answer
   x = 4,110.91