Finding the Fourth Proportional to 72,112.79, 108,169.27 and 18,804.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,112.79 : 108,169.27 = 18,804.72 : x
2. Step 2: Convert to fraction form
   72,112.79/108,169.27 = 18,804.72/x
3. Step 3: Cross multiply
   72,112.79x = 108,169.27 × 18,804.72
4. Step 4: Simplify right side
   72,112.79x = 2,034,092,787.94
5. Step 5: Solve for x
   x = 2,034,092,787.94/72,112.79
6. Step 6: Final answer
   x = 28,207.10