Finding the Fourth Proportional to 82,121.54, 123,181.23 and 19,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82,121.54 : 123,181.23 = 19,791.50 : x
2. Step 2: Convert to fraction form
   82,121.54/123,181.23 = 19,791.50/x
3. Step 3: Cross multiply
   82,121.54x = 123,181.23 × 19,791.50
4. Step 4: Simplify right side
   82,121.54x = 2,437,941,313.55
5. Step 5: Solve for x
   x = 2,437,941,313.55/82,121.54
6. Step 6: Final answer
   x = 29,686.99