Finding the Fourth Proportional to 21,978.42, 32,973.10 and 6,396.05

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.42 : 32,973.10 = 6,396.05 : x
2. Step 2: Convert to fraction form
   21,978.42/32,973.10 = 6,396.05/x
3. Step 3: Cross multiply
   21,978.42x = 32,973.10 × 6,396.05
4. Step 4: Simplify right side
   21,978.42x = 210,897,495.21
5. Step 5: Solve for x
   x = 210,897,495.21/21,978.42
6. Step 6: Final answer
   x = 9,595.66