Finding the Fourth Proportional to 82,247.31, 123,371.69 and 19,917.87

Step by Step Solution

1. Step 1: Write the proportion equation
   82,247.31 : 123,371.69 = 19,917.87 : x
2. Step 2: Convert to fraction form
   82,247.31/123,371.69 = 19,917.87/x
3. Step 3: Cross multiply
   82,247.31x = 123,371.69 × 19,917.87
4. Step 4: Simplify right side
   82,247.31x = 2,457,301,183.51
5. Step 5: Solve for x
   x = 2,457,301,183.51/82,247.31
6. Step 6: Final answer
   x = 29,876.98