Finding the Fourth Proportional to 171,308.76, 256,815.38 and 82,440.02

Step by Step Solution

1. Step 1: Write the proportion equation
   171,308.76 : 256,815.38 = 82,440.02 : x
2. Step 2: Convert to fraction form
   171,308.76/256,815.38 = 82,440.02/x
3. Step 3: Cross multiply
   171,308.76x = 256,815.38 × 82,440.02
4. Step 4: Simplify right side
   171,308.76x = 21,171,865,063.51
5. Step 5: Solve for x
   x = 21,171,865,063.51/171,308.76
6. Step 6: Final answer
   x = 123,588.92