Finding the Fourth Proportional to 21,986.52, 32,995.98 and 13,678.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,986.52 : 32,995.98 = 13,678.76 : x
2. Step 2: Convert to fraction form
   21,986.52/32,995.98 = 13,678.76/x
3. Step 3: Cross multiply
   21,986.52x = 32,995.98 × 13,678.76
4. Step 4: Simplify right side
   21,986.52x = 451,343,926.40
5. Step 5: Solve for x
   x = 451,343,926.40/21,986.52
6. Step 6: Final answer
   x = 20,528.21