Finding the Fourth Proportional to 70,578.72, 105,874.56 and 31,167.36

Step by Step Solution

1. Step 1: Write the proportion equation
   70,578.72 : 105,874.56 = 31,167.36 : x
2. Step 2: Convert to fraction form
   70,578.72/105,874.56 = 31,167.36/x
3. Step 3: Cross multiply
   70,578.72x = 105,874.56 × 31,167.36
4. Step 4: Simplify right side
   70,578.72x = 3,299,830,526.36
5. Step 5: Solve for x
   x = 3,299,830,526.36/70,578.72
6. Step 6: Final answer
   x = 46,753.90