Finding the Fourth Proportional to 21,587.50, 29,790.84 and 12,156.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,587.50 : 29,790.84 = 12,156.22 : x
2. Step 2: Convert to fraction form
   21,587.50/29,790.84 = 12,156.22/x
3. Step 3: Cross multiply
   21,587.50x = 29,790.84 × 12,156.22
4. Step 4: Simplify right side
   21,587.50x = 362,144,005.02
5. Step 5: Solve for x
   x = 362,144,005.02/21,587.50
6. Step 6: Final answer
   x = 16,775.63