Finding the Fourth Proportional to 283,895.40, 425,719.47 and 81,446.83

Step by Step Solution

1. Step 1: Write the proportion equation
   283,895.40 : 425,719.47 = 81,446.83 : x
2. Step 2: Convert to fraction form
   283,895.40/425,719.47 = 81,446.83/x
3. Step 3: Cross multiply
   283,895.40x = 425,719.47 × 81,446.83
4. Step 4: Simplify right side
   283,895.40x = 34,673,501,300.78
5. Step 5: Solve for x
   x = 34,673,501,300.78/283,895.40
6. Step 6: Final answer
   x = 122,134.78