Finding the Fourth Proportional to 21,978.60, 32,967.43 and 5,338.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.60 : 32,967.43 = 5,338.71 : x
2. Step 2: Convert to fraction form
   21,978.60/32,967.43 = 5,338.71/x
3. Step 3: Cross multiply
   21,978.60x = 32,967.43 × 5,338.71
4. Step 4: Simplify right side
   21,978.60x = 176,003,548.22
5. Step 5: Solve for x
   x = 176,003,548.22/21,978.60
6. Step 6: Final answer
   x = 8,007.95