Finding the Fourth Proportional to 21,595, 32,319.34 and 13,280.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,595 : 32,319.34 = 13,280.28 : x
2. Step 2: Convert to fraction form
   21,595/32,319.34 = 13,280.28/x
3. Step 3: Cross multiply
   21,595x = 32,319.34 × 13,280.28
4. Step 4: Simplify right side
   21,595x = 429,209,884.62
5. Step 5: Solve for x
   x = 429,209,884.62/21,595
6. Step 6: Final answer
   x = 19,875.43