Finding the Fourth Proportional to 72,776.54, 109,164.96 and 20,186.17

Step by Step Solution

1. Step 1: Write the proportion equation
   72,776.54 : 109,164.96 = 20,186.17 : x
2. Step 2: Convert to fraction form
   72,776.54/109,164.96 = 20,186.17/x
3. Step 3: Cross multiply
   72,776.54x = 109,164.96 × 20,186.17
4. Step 4: Simplify right side
   72,776.54x = 2,203,622,167.69
5. Step 5: Solve for x
   x = 2,203,622,167.69/72,776.54
6. Step 6: Final answer
   x = 30,279.29