Finding the Fourth Proportional to 139,215.17, 191,971.69 and 82,615.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,215.17 : 191,971.69 = 82,615.61 : x
2. Step 2: Convert to fraction form
   139,215.17/191,971.69 = 82,615.61/x
3. Step 3: Cross multiply
   139,215.17x = 191,971.69 × 82,615.61
4. Step 4: Simplify right side
   139,215.17x = 15,859,858,545.47
5. Step 5: Solve for x
   x = 15,859,858,545.47/139,215.17
6. Step 6: Final answer
   x = 113,923.35