Finding the Fourth Proportional to 21,978.50, 32,969.27 and 8,830.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,978.50 : 32,969.27 = 8,830.86 : x
2. Step 2: Convert to fraction form
   21,978.50/32,969.27 = 8,830.86/x
3. Step 3: Cross multiply
   21,978.50x = 32,969.27 × 8,830.86
4. Step 4: Simplify right side
   21,978.50x = 291,147,007.67
5. Step 5: Solve for x
   x = 291,147,007.67/21,978.50
6. Step 6: Final answer
   x = 13,246.90