Finding the Fourth Proportional to 20,061.60, 30,138.53 and 14,152.09

Step by Step Solution

1. Step 1: Write the proportion equation
   20,061.60 : 30,138.53 = 14,152.09 : x
2. Step 2: Convert to fraction form
   20,061.60/30,138.53 = 14,152.09/x
3. Step 3: Cross multiply
   20,061.60x = 30,138.53 × 14,152.09
4. Step 4: Simplify right side
   20,061.60x = 426,523,189.03
5. Step 5: Solve for x
   x = 426,523,189.03/20,061.60
6. Step 6: Final answer
   x = 21,260.68