Finding the Fourth Proportional to 78,378.50, 108,095.72 and 52,880.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,378.50 : 108,095.72 = 52,880.78 : x
2. Step 2: Convert to fraction form
   78,378.50/108,095.72 = 52,880.78/x
3. Step 3: Cross multiply
   78,378.50x = 108,095.72 × 52,880.78
4. Step 4: Simplify right side
   78,378.50x = 5,716,185,994.10
5. Step 5: Solve for x
   x = 5,716,185,994.10/78,378.50
6. Step 6: Final answer
   x = 72,930.53