Finding the Fourth Proportional to 72,423.52, 108,139.82 and 64,878.37

Step by Step Solution

1. Step 1: Write the proportion equation
   72,423.52 : 108,139.82 = 64,878.37 : x
2. Step 2: Convert to fraction form
   72,423.52/108,139.82 = 64,878.37/x
3. Step 3: Cross multiply
   72,423.52x = 108,139.82 × 64,878.37
4. Step 4: Simplify right side
   72,423.52x = 7,015,935,253.69
5. Step 5: Solve for x
   x = 7,015,935,253.69/72,423.52
6. Step 6: Final answer
   x = 96,873.71