Finding the Fourth Proportional to 21,772.89, 32,662.39 and 6,978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,772.89 : 32,662.39 = 6,978.34 : x
2. Step 2: Convert to fraction form
   21,772.89/32,662.39 = 6,978.34/x
3. Step 3: Cross multiply
   21,772.89x = 32,662.39 × 6,978.34
4. Step 4: Simplify right side
   21,772.89x = 227,929,262.63
5. Step 5: Solve for x
   x = 227,929,262.63/21,772.89
6. Step 6: Final answer
   x = 10,468.49