Finding the Fourth Proportional to 103,639.24, 155,283.90 and 82,819

Step by Step Solution

1. Step 1: Write the proportion equation
   103,639.24 : 155,283.90 = 82,819 : x
2. Step 2: Convert to fraction form
   103,639.24/155,283.90 = 82,819/x
3. Step 3: Cross multiply
   103,639.24x = 155,283.90 × 82,819
4. Step 4: Simplify right side
   103,639.24x = 12,860,457,314.10
5. Step 5: Solve for x
   x = 12,860,457,314.10/103,639.24
6. Step 6: Final answer
   x = 124,088.69