Finding the Fourth Proportional to 7,123.22, 10,685.86 and 2,191.54

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.22 : 10,685.86 = 2,191.54 : x
2. Step 2: Convert to fraction form
   7,123.22/10,685.86 = 2,191.54/x
3. Step 3: Cross multiply
   7,123.22x = 10,685.86 × 2,191.54
4. Step 4: Simplify right side
   7,123.22x = 23,418,489.62
5. Step 5: Solve for x
   x = 23,418,489.62/7,123.22
6. Step 6: Final answer
   x = 3,287.63