Finding the Fourth Proportional to 78,510.50, 117,696.81 and 31,159.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,510.50 : 117,696.81 = 31,159.01 : x
2. Step 2: Convert to fraction form
   78,510.50/117,696.81 = 31,159.01/x
3. Step 3: Cross multiply
   78,510.50x = 117,696.81 × 31,159.01
4. Step 4: Simplify right side
   78,510.50x = 3,667,315,491.27
5. Step 5: Solve for x
   x = 3,667,315,491.27/78,510.50
6. Step 6: Final answer
   x = 46,711.15