Finding the Fourth Proportional to 72,719.04, 109,080.94 and 20,124.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,719.04 : 109,080.94 = 20,124.12 : x
2. Step 2: Convert to fraction form
   72,719.04/109,080.94 = 20,124.12/x
3. Step 3: Cross multiply
   72,719.04x = 109,080.94 × 20,124.12
4. Step 4: Simplify right side
   72,719.04x = 2,195,157,926.27
5. Step 5: Solve for x
   x = 2,195,157,926.27/72,719.04
6. Step 6: Final answer
   x = 30,186.84