Finding the Fourth Proportional to 82,142.84, 113,269.59 and 64,884.87

Step by Step Solution

1. Step 1: Write the proportion equation
   82,142.84 : 113,269.59 = 64,884.87 : x
2. Step 2: Convert to fraction form
   82,142.84/113,269.59 = 64,884.87/x
3. Step 3: Cross multiply
   82,142.84x = 113,269.59 × 64,884.87
4. Step 4: Simplify right side
   82,142.84x = 7,349,482,622.10
5. Step 5: Solve for x
   x = 7,349,482,622.10/82,142.84
6. Step 6: Final answer
   x = 89,471.98