Finding the Fourth Proportional to 78,429.54, 117,631.89 and 65,187.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.54 : 117,631.89 = 65,187.57 : x
2. Step 2: Convert to fraction form
   78,429.54/117,631.89 = 65,187.57/x
3. Step 3: Cross multiply
   78,429.54x = 117,631.89 × 65,187.57
4. Step 4: Simplify right side
   78,429.54x = 7,668,137,063.61
5. Step 5: Solve for x
   x = 7,668,137,063.61/78,429.54
6. Step 6: Final answer
   x = 97,771.03