Finding the Fourth Proportional to 78,105.15, 107,733.87 and 55,168.65

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.15 : 107,733.87 = 55,168.65 : x
2. Step 2: Convert to fraction form
   78,105.15/107,733.87 = 55,168.65/x
3. Step 3: Cross multiply
   78,105.15x = 107,733.87 × 55,168.65
4. Step 4: Simplify right side
   78,105.15x = 5,943,532,167.18
5. Step 5: Solve for x
   x = 5,943,532,167.18/78,105.15
6. Step 6: Final answer
   x = 76,096.55