Finding the Fourth Proportional to 21,610.50, 32,415.42 and 13,179.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,610.50 : 32,415.42 = 13,179.48 : x
2. Step 2: Convert to fraction form
   21,610.50/32,415.42 = 13,179.48/x
3. Step 3: Cross multiply
   21,610.50x = 32,415.42 × 13,179.48
4. Step 4: Simplify right side
   21,610.50x = 427,218,379.58
5. Step 5: Solve for x
   x = 427,218,379.58/21,610.50
6. Step 6: Final answer
   x = 19,769.02