Finding the Fourth Proportional to 72,709.39, 109,066.52 and 20,114.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72,709.39 : 109,066.52 = 20,114.47 : x
2. Step 2: Convert to fraction form
   72,709.39/109,066.52 = 20,114.47/x
3. Step 3: Cross multiply
   72,709.39x = 109,066.52 × 20,114.47
4. Step 4: Simplify right side
   72,709.39x = 2,193,814,871.31
5. Step 5: Solve for x
   x = 2,193,814,871.31/72,709.39
6. Step 6: Final answer
   x = 30,172.37