Finding the Fourth Proportional to 78,447.36, 117,768.52 and 78,087.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,447.36 : 117,768.52 = 78,087.72 : x
2. Step 2: Convert to fraction form
   78,447.36/117,768.52 = 78,087.72/x
3. Step 3: Cross multiply
   78,447.36x = 117,768.52 × 78,087.72
4. Step 4: Simplify right side
   78,447.36x = 9,196,275,214.57
5. Step 5: Solve for x
   x = 9,196,275,214.57/78,447.36
6. Step 6: Final answer
   x = 117,228.61