Finding the Fourth Proportional to 82,431.45, 113,631.39 and 64,495.31

Step by Step Solution

1. Step 1: Write the proportion equation
   82,431.45 : 113,631.39 = 64,495.31 : x
2. Step 2: Convert to fraction form
   82,431.45/113,631.39 = 64,495.31/x
3. Step 3: Cross multiply
   82,431.45x = 113,631.39 × 64,495.31
4. Step 4: Simplify right side
   82,431.45x = 7,328,692,386.48
5. Step 5: Solve for x
   x = 7,328,692,386.48/82,431.45
6. Step 6: Final answer
   x = 88,906.51