Finding the Fourth Proportional to 82,171.89, 113,370.66 and 64,889.37

Step by Step Solution

1. Step 1: Write the proportion equation
   82,171.89 : 113,370.66 = 64,889.37 : x
2. Step 2: Convert to fraction form
   82,171.89/113,370.66 = 64,889.37/x
3. Step 3: Cross multiply
   82,171.89x = 113,370.66 × 64,889.37
4. Step 4: Simplify right side
   82,171.89x = 7,356,550,703.88
5. Step 5: Solve for x
   x = 7,356,550,703.88/82,171.89
6. Step 6: Final answer
   x = 89,526.37