Finding the Fourth Proportional to 171,111.67, 256,711.25 and 71,238.67

Step by Step Solution

1. Step 1: Write the proportion equation
   171,111.67 : 256,711.25 = 71,238.67 : x
2. Step 2: Convert to fraction form
   171,111.67/256,711.25 = 71,238.67/x
3. Step 3: Cross multiply
   171,111.67x = 256,711.25 × 71,238.67
4. Step 4: Simplify right side
   171,111.67x = 18,287,766,384.29
5. Step 5: Solve for x
   x = 18,287,766,384.29/171,111.67
6. Step 6: Final answer
   x = 106,876.21