Finding the Fourth Proportional to 21,022.56, 29,009.88 and 12,071.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,022.56 : 29,009.88 = 12,071.52 : x
2. Step 2: Convert to fraction form
   21,022.56/29,009.88 = 12,071.52/x
3. Step 3: Cross multiply
   21,022.56x = 29,009.88 × 12,071.52
4. Step 4: Simplify right side
   21,022.56x = 350,193,346.62
5. Step 5: Solve for x
   x = 350,193,346.62/21,022.56
6. Step 6: Final answer
   x = 16,657.98