Finding the Fourth Proportional to 21,558.54, 32,344.56 and 13,710

Step by Step Solution

1. Step 1: Write the proportion equation
   21,558.54 : 32,344.56 = 13,710 : x
2. Step 2: Convert to fraction form
   21,558.54/32,344.56 = 13,710/x
3. Step 3: Cross multiply
   21,558.54x = 32,344.56 × 13,710
4. Step 4: Simplify right side
   21,558.54x = 443,443,917.60
5. Step 5: Solve for x
   x = 443,443,917.60/21,558.54
6. Step 6: Final answer
   x = 20,569.29