Finding the Fourth Proportional to 78,309.42, 117,469.17 and 31,561.26

Step by Step Solution

1. Step 1: Write the proportion equation
   78,309.42 : 117,469.17 = 31,561.26 : x
2. Step 2: Convert to fraction form
   78,309.42/117,469.17 = 31,561.26/x
3. Step 3: Cross multiply
   78,309.42x = 117,469.17 × 31,561.26
4. Step 4: Simplify right side
   78,309.42x = 3,707,475,016.35
5. Step 5: Solve for x
   x = 3,707,475,016.35/78,309.42
6. Step 6: Final answer
   x = 47,343.92