Finding the Fourth Proportional to 21,417.84, 32,137.56 and 12,068.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,417.84 : 32,137.56 = 12,068.28 : x
2. Step 2: Convert to fraction form
   21,417.84/32,137.56 = 12,068.28/x
3. Step 3: Cross multiply
   21,417.84x = 32,137.56 × 12,068.28
4. Step 4: Simplify right side
   21,417.84x = 387,845,072.60
5. Step 5: Solve for x
   x = 387,845,072.60/21,417.84
6. Step 6: Final answer
   x = 18,108.51