Finding the Fourth Proportional to 21,649.52, 29,877.72 and 12,214.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,649.52 : 29,877.72 = 12,214.64 : x
2. Step 2: Convert to fraction form
   21,649.52/29,877.72 = 12,214.64/x
3. Step 3: Cross multiply
   21,649.52x = 29,877.72 × 12,214.64
4. Step 4: Simplify right side
   21,649.52x = 364,945,593.82
5. Step 5: Solve for x
   x = 364,945,593.82/21,649.52
6. Step 6: Final answer
   x = 16,856.98