Finding the Fourth Proportional to 82,288.28, 123,432.42 and 19,958.78

Step by Step Solution

1. Step 1: Write the proportion equation
   82,288.28 : 123,432.42 = 19,958.78 : x
2. Step 2: Convert to fraction form
   82,288.28/123,432.42 = 19,958.78/x
3. Step 3: Cross multiply
   82,288.28x = 123,432.42 × 19,958.78
4. Step 4: Simplify right side
   82,288.28x = 2,463,559,898.49
5. Step 5: Solve for x
   x = 2,463,559,898.49/82,288.28
6. Step 6: Final answer
   x = 29,938.16