Finding the Fourth Proportional to 82,128.06, 123,191.82 and 19,798.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,128.06 : 123,191.82 = 19,798.56 : x
2. Step 2: Convert to fraction form
   82,128.06/123,191.82 = 19,798.56/x
3. Step 3: Cross multiply
   82,128.06x = 123,191.82 × 19,798.56
4. Step 4: Simplify right side
   82,128.06x = 2,439,020,639.78
5. Step 5: Solve for x
   x = 2,439,020,639.78/82,128.06
6. Step 6: Final answer
   x = 29,697.77