Finding the Fourth Proportional to 82,086.29, 123,129.45 and 19,756.79

Step by Step Solution

1. Step 1: Write the proportion equation
   82,086.29 : 123,129.45 = 19,756.79 : x
2. Step 2: Convert to fraction form
   82,086.29/123,129.45 = 19,756.79/x
3. Step 3: Cross multiply
   82,086.29x = 123,129.45 × 19,756.79
4. Step 4: Simplify right side
   82,086.29x = 2,432,642,070.82
5. Step 5: Solve for x
   x = 2,432,642,070.82/82,086.29
6. Step 6: Final answer
   x = 29,635.18