Finding the Fourth Proportional to 78,366.99, 108,171 and 50,072.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,366.99 : 108,171 = 50,072.61 : x
2. Step 2: Convert to fraction form
   78,366.99/108,171 = 50,072.61/x
3. Step 3: Cross multiply
   78,366.99x = 108,171 × 50,072.61
4. Step 4: Simplify right side
   78,366.99x = 5,416,404,296.31
5. Step 5: Solve for x
   x = 5,416,404,296.31/78,366.99
6. Step 6: Final answer
   x = 69,115.89