Finding the Fourth Proportional to 72,577.17, 108,872.61 and 28,207.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,577.17 : 108,872.61 = 28,207.33 : x
2. Step 2: Convert to fraction form
   72,577.17/108,872.61 = 28,207.33/x
3. Step 3: Cross multiply
   72,577.17x = 108,872.61 × 28,207.33
4. Step 4: Simplify right side
   72,577.17x = 3,071,004,952.83
5. Step 5: Solve for x
   x = 3,071,004,952.83/72,577.17
6. Step 6: Final answer
   x = 42,313.65