Finding the Fourth Proportional to 78,324.72, 117,574.56 and 31,610.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,324.72 : 117,574.56 = 31,610.40 : x
2. Step 2: Convert to fraction form
   78,324.72/117,574.56 = 31,610.40/x
3. Step 3: Cross multiply
   78,324.72x = 117,574.56 × 31,610.40
4. Step 4: Simplify right side
   78,324.72x = 3,716,578,871.42
5. Step 5: Solve for x
   x = 3,716,578,871.42/78,324.72
6. Step 6: Final answer
   x = 47,450.91