Finding the Fourth Proportional to 143,245.63, 197,667.38 and 82,820.15

Step by Step Solution

1. Step 1: Write the proportion equation
   143,245.63 : 197,667.38 = 82,820.15 : x
2. Step 2: Convert to fraction form
   143,245.63/197,667.38 = 82,820.15/x
3. Step 3: Cross multiply
   143,245.63x = 197,667.38 × 82,820.15
4. Step 4: Simplify right side
   143,245.63x = 16,370,842,061.71
5. Step 5: Solve for x
   x = 16,370,842,061.71/143,245.63
6. Step 6: Final answer
   x = 114,285.11