Finding the Fourth Proportional to 78,064.81, 117,113.42 and 31,321.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,064.81 : 117,113.42 = 31,321.33 : x
2. Step 2: Convert to fraction form
   78,064.81/117,113.42 = 31,321.33/x
3. Step 3: Cross multiply
   78,064.81x = 117,113.42 × 31,321.33
4. Step 4: Simplify right side
   78,064.81x = 3,668,147,918.64
5. Step 5: Solve for x
   x = 3,668,147,918.64/78,064.81
6. Step 6: Final answer
   x = 46,988.49