Finding the Fourth Proportional to 21,638.64, 32,372.57 and 16,388.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,638.64 : 32,372.57 = 16,388.82 : x
2. Step 2: Convert to fraction form
   21,638.64/32,372.57 = 16,388.82/x
3. Step 3: Cross multiply
   21,638.64x = 32,372.57 × 16,388.82
4. Step 4: Simplify right side
   21,638.64x = 530,547,978.86
5. Step 5: Solve for x
   x = 530,547,978.86/21,638.64
6. Step 6: Final answer
   x = 24,518.55