Finding the Fourth Proportional to 72,808.27, 109,167.80 and 28,383.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,808.27 : 109,167.80 = 28,383.12 : x
2. Step 2: Convert to fraction form
   72,808.27/109,167.80 = 28,383.12/x
3. Step 3: Cross multiply
   72,808.27x = 109,167.80 × 28,383.12
4. Step 4: Simplify right side
   72,808.27x = 3,098,522,767.54
5. Step 5: Solve for x
   x = 3,098,522,767.54/72,808.27
6. Step 6: Final answer
   x = 42,557.29