Finding the Fourth Proportional to 21,548.72, 32,111.74 and 21,367.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,548.72 : 32,111.74 = 21,367.28 : x
2. Step 2: Convert to fraction form
   21,548.72/32,111.74 = 21,367.28/x
3. Step 3: Cross multiply
   21,548.72x = 32,111.74 × 21,367.28
4. Step 4: Simplify right side
   21,548.72x = 686,140,539.87
5. Step 5: Solve for x
   x = 686,140,539.87/21,548.72
6. Step 6: Final answer
   x = 31,841.36