Finding the Fourth Proportional to 82,180.32, 122,675.92 and 72,215.76

Step by Step Solution

1. Step 1: Write the proportion equation
   82,180.32 : 122,675.92 = 72,215.76 : x
2. Step 2: Convert to fraction form
   82,180.32/122,675.92 = 72,215.76/x
3. Step 3: Cross multiply
   82,180.32x = 122,675.92 × 72,215.76
4. Step 4: Simplify right side
   82,180.32x = 8,859,134,796.50
5. Step 5: Solve for x
   x = 8,859,134,796.50/82,180.32
6. Step 6: Final answer
   x = 107,801.17