Finding the Fourth Proportional to 21,978.91, 32,986.08 and 11,452.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.91 : 32,986.08 = 11,452.15 : x
2. Step 2: Convert to fraction form
   21,978.91/32,986.08 = 11,452.15/x
3. Step 3: Cross multiply
   21,978.91x = 32,986.08 × 11,452.15
4. Step 4: Simplify right side
   21,978.91x = 377,761,536.07
5. Step 5: Solve for x
   x = 377,761,536.07/21,978.91
6. Step 6: Final answer
   x = 17,187.46