Finding the Fourth Proportional to 82,736.82, 113,888.34 and 72,108

Step by Step Solution

1. Step 1: Write the proportion equation
   82,736.82 : 113,888.34 = 72,108 : x
2. Step 2: Convert to fraction form
   82,736.82/113,888.34 = 72,108/x
3. Step 3: Cross multiply
   82,736.82x = 113,888.34 × 72,108
4. Step 4: Simplify right side
   82,736.82x = 8,212,260,420.72
5. Step 5: Solve for x
   x = 8,212,260,420.72/82,736.82
6. Step 6: Final answer
   x = 99,257.63