Finding the Fourth Proportional to 72,388.77, 108,088.04 and 64,843.62

Step by Step Solution

1. Step 1: Write the proportion equation
   72,388.77 : 108,088.04 = 64,843.62 : x
2. Step 2: Convert to fraction form
   72,388.77/108,088.04 = 64,843.62/x
3. Step 3: Cross multiply
   72,388.77x = 108,088.04 × 64,843.62
4. Step 4: Simplify right side
   72,388.77x = 7,008,819,468.09
5. Step 5: Solve for x
   x = 7,008,819,468.09/72,388.77
6. Step 6: Final answer
   x = 96,821.92