Finding the Fourth Proportional to 78,472.64, 108,315.96 and 53,336.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,472.64 : 108,315.96 = 53,336.72 : x
2. Step 2: Convert to fraction form
   78,472.64/108,315.96 = 53,336.72/x
3. Step 3: Cross multiply
   78,472.64x = 108,315.96 × 53,336.72
4. Step 4: Simplify right side
   78,472.64x = 5,777,218,030.05
5. Step 5: Solve for x
   x = 5,777,218,030.05/78,472.64
6. Step 6: Final answer
   x = 73,620.79