Finding the Fourth Proportional to 129,582.12, 178,826.23 and 72,227.31

Step by Step Solution

1. Step 1: Write the proportion equation
   129,582.12 : 178,826.23 = 72,227.31 : x
2. Step 2: Convert to fraction form
   129,582.12/178,826.23 = 72,227.31/x
3. Step 3: Cross multiply
   129,582.12x = 178,826.23 × 72,227.31
4. Step 4: Simplify right side
   129,582.12x = 12,916,137,550.34
5. Step 5: Solve for x
   x = 12,916,137,550.34/129,582.12
6. Step 6: Final answer
   x = 99,675.31