Finding the Fourth Proportional to 131,826.09, 181,920.27 and 72,890.12

Step by Step Solution

1. Step 1: Write the proportion equation
   131,826.09 : 181,920.27 = 72,890.12 : x
2. Step 2: Convert to fraction form
   131,826.09/181,920.27 = 72,890.12/x
3. Step 3: Cross multiply
   131,826.09x = 181,920.27 × 72,890.12
4. Step 4: Simplify right side
   131,826.09x = 13,260,189,401.13
5. Step 5: Solve for x
   x = 13,260,189,401.13/131,826.09
6. Step 6: Final answer
   x = 100,588.51