Finding the Fourth Proportional to 82,458.12, 113,836.32 and 64,515

Step by Step Solution

1. Step 1: Write the proportion equation
   82,458.12 : 113,836.32 = 64,515 : x
2. Step 2: Convert to fraction form
   82,458.12/113,836.32 = 64,515/x
3. Step 3: Cross multiply
   82,458.12x = 113,836.32 × 64,515
4. Step 4: Simplify right side
   82,458.12x = 7,344,150,184.80
5. Step 5: Solve for x
   x = 7,344,150,184.80/82,458.12
6. Step 6: Final answer
   x = 89,065.21