Finding the Fourth Proportional to 20,081.06, 30,088.72 and 12,159.58

Step by Step Solution

1. Step 1: Write the proportion equation
   20,081.06 : 30,088.72 = 12,159.58 : x
2. Step 2: Convert to fraction form
   20,081.06/30,088.72 = 12,159.58/x
3. Step 3: Cross multiply
   20,081.06x = 30,088.72 × 12,159.58
4. Step 4: Simplify right side
   20,081.06x = 365,866,092.61
5. Step 5: Solve for x
   x = 365,866,092.61/20,081.06
6. Step 6: Final answer
   x = 18,219.46