Finding the Fourth Proportional to 78,082.56, 117,128.97 and 31,329.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,082.56 : 117,128.97 = 31,329.36 : x
2. Step 2: Convert to fraction form
   78,082.56/117,128.97 = 31,329.36/x
3. Step 3: Cross multiply
   78,082.56x = 117,128.97 × 31,329.36
4. Step 4: Simplify right side
   78,082.56x = 3,669,575,667.56
5. Step 5: Solve for x
   x = 3,669,575,667.56/78,082.56
6. Step 6: Final answer
   x = 46,996.10