Finding the Fourth Proportional to 21,477.71, 32,162.82 and 13,556.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,477.71 : 32,162.82 = 13,556.31 : x
2. Step 2: Convert to fraction form
   21,477.71/32,162.82 = 13,556.31/x
3. Step 3: Cross multiply
   21,477.71x = 32,162.82 × 13,556.31
4. Step 4: Simplify right side
   21,477.71x = 436,009,244.12
5. Step 5: Solve for x
   x = 436,009,244.12/21,477.71
6. Step 6: Final answer
   x = 20,300.55