Finding the Fourth Proportional to 21,978.14, 32,968.72 and 8,830.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.14 : 32,968.72 = 8,830.49 : x
2. Step 2: Convert to fraction form
   21,978.14/32,968.72 = 8,830.49/x
3. Step 3: Cross multiply
   21,978.14x = 32,968.72 × 8,830.49
4. Step 4: Simplify right side
   21,978.14x = 291,129,798.47
5. Step 5: Solve for x
   x = 291,129,798.47/21,978.14
6. Step 6: Final answer
   x = 13,246.34