Finding the Fourth Proportional to 20,105.01, 30,172.10 and 14,142.70

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.01 : 30,172.10 = 14,142.70 : x
2. Step 2: Convert to fraction form
   20,105.01/30,172.10 = 14,142.70/x
3. Step 3: Cross multiply
   20,105.01x = 30,172.10 × 14,142.70
4. Step 4: Simplify right side
   20,105.01x = 426,714,925.67
5. Step 5: Solve for x
   x = 426,714,925.67/20,105.01
6. Step 6: Final answer
   x = 21,224.31