Finding the Fourth Proportional to 21,141.06, 29,174.59 and 12,188.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,141.06 : 29,174.59 = 12,188.52 : x
2. Step 2: Convert to fraction form
   21,141.06/29,174.59 = 12,188.52/x
3. Step 3: Cross multiply
   21,141.06x = 29,174.59 × 12,188.52
4. Step 4: Simplify right side
   21,141.06x = 355,595,073.71
5. Step 5: Solve for x
   x = 355,595,073.71/21,141.06
6. Step 6: Final answer
   x = 16,820.12