Finding the Fourth Proportional to 21,978, 32,968.52 and 8,830.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978 : 32,968.52 = 8,830.36 : x
2. Step 2: Convert to fraction form
   21,978/32,968.52 = 8,830.36/x
3. Step 3: Cross multiply
   21,978x = 32,968.52 × 8,830.36
4. Step 4: Simplify right side
   21,978x = 291,123,900.27
5. Step 5: Solve for x
   x = 291,123,900.27/21,978
6. Step 6: Final answer
   x = 13,246.15