Finding the Fourth Proportional to 70,758.72, 106,174.60 and 31,343.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,758.72 : 106,174.60 = 31,343.72 : x
2. Step 2: Convert to fraction form
   70,758.72/106,174.60 = 31,343.72/x
3. Step 3: Cross multiply
   70,758.72x = 106,174.60 × 31,343.72
4. Step 4: Simplify right side
   70,758.72x = 3,327,906,324.28
5. Step 5: Solve for x
   x = 3,327,906,324.28/70,758.72
6. Step 6: Final answer
   x = 47,031.75