Finding the Fourth Proportional to 21,610.06, 29,820.69 and 12,178.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,610.06 : 29,820.69 = 12,178.01 : x
2. Step 2: Convert to fraction form
   21,610.06/29,820.69 = 12,178.01/x
3. Step 3: Cross multiply
   21,610.06x = 29,820.69 × 12,178.01
4. Step 4: Simplify right side
   21,610.06x = 363,156,735.58
5. Step 5: Solve for x
   x = 363,156,735.58/21,610.06
6. Step 6: Final answer
   x = 16,804.99