Finding the Fourth Proportional to 78,749.76, 108,647.52 and 54,867.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,749.76 : 108,647.52 = 54,867.72 : x
2. Step 2: Convert to fraction form
   78,749.76/108,647.52 = 54,867.72/x
3. Step 3: Cross multiply
   78,749.76x = 108,647.52 × 54,867.72
4. Step 4: Simplify right side
   78,749.76x = 5,961,241,706.05
5. Step 5: Solve for x
   x = 5,961,241,706.05/78,749.76
6. Step 6: Final answer
   x = 75,698.54