Finding the Fourth Proportional to 82,507.52, 123,760.20 and 20,178.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,507.52 : 123,760.20 = 20,178.56 : x
2. Step 2: Convert to fraction form
   82,507.52/123,760.20 = 20,178.56/x
3. Step 3: Cross multiply
   82,507.52x = 123,760.20 × 20,178.56
4. Step 4: Simplify right side
   82,507.52x = 2,497,302,621.31
5. Step 5: Solve for x
   x = 2,497,302,621.31/82,507.52
6. Step 6: Final answer
   x = 30,267.58