Finding the Fourth Proportional to 71,578.98, 107,370.72 and 34,143.12

Step by Step Solution

1. Step 1: Write the proportion equation
   71,578.98 : 107,370.72 = 34,143.12 : x
2. Step 2: Convert to fraction form
   71,578.98/107,370.72 = 34,143.12/x
3. Step 3: Cross multiply
   71,578.98x = 107,370.72 × 34,143.12
4. Step 4: Simplify right side
   71,578.98x = 3,665,971,377.45
5. Step 5: Solve for x
   x = 3,665,971,377.45/71,578.98
6. Step 6: Final answer
   x = 51,215.75