Finding the Fourth Proportional to 72,577.18, 108,872.61 and 28,207.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,577.18 : 108,872.61 = 28,207.33 : x
2. Step 2: Convert to fraction form
   72,577.18/108,872.61 = 28,207.33/x
3. Step 3: Cross multiply
   72,577.18x = 108,872.61 × 28,207.33
4. Step 4: Simplify right side
   72,577.18x = 3,071,005,093.87
5. Step 5: Solve for x
   x = 3,071,005,093.87/72,577.18
6. Step 6: Final answer
   x = 42,313.65