Finding the Fourth Proportional to 78,970.79, 108,944.72 and 47,121.29

Step by Step Solution

1. Step 1: Write the proportion equation
   78,970.79 : 108,944.72 = 47,121.29 : x
2. Step 2: Convert to fraction form
   78,970.79/108,944.72 = 47,121.29/x
3. Step 3: Cross multiply
   78,970.79x = 108,944.72 × 47,121.29
4. Step 4: Simplify right side
   78,970.79x = 5,133,614,964.76
5. Step 5: Solve for x
   x = 5,133,614,964.76/78,970.79
6. Step 6: Final answer
   x = 65,006.50