Finding the Fourth Proportional to 151,018.41, 208,406.21 and 83,039.78

Step by Step Solution

1. Step 1: Write the proportion equation
   151,018.41 : 208,406.21 = 83,039.78 : x
2. Step 2: Convert to fraction form
   151,018.41/208,406.21 = 83,039.78/x
3. Step 3: Cross multiply
   151,018.41x = 208,406.21 × 83,039.78
4. Step 4: Simplify right side
   151,018.41x = 17,306,004,371.80
5. Step 5: Solve for x
   x = 17,306,004,371.80/151,018.41
6. Step 6: Final answer
   x = 114,595.33