Finding the Fourth Proportional to 72,734.63, 109,089.57 and 20,131.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,734.63 : 109,089.57 = 20,131.79 : x
2. Step 2: Convert to fraction form
   72,734.63/109,089.57 = 20,131.79/x
3. Step 3: Cross multiply
   72,734.63x = 109,089.57 × 20,131.79
4. Step 4: Simplify right side
   72,734.63x = 2,196,168,314.43
5. Step 5: Solve for x
   x = 2,196,168,314.43/72,734.63
6. Step 6: Final answer
   x = 30,194.26