Finding the Fourth Proportional to 76,850.81, 106,053.89 and 42,859.33

Step by Step Solution

1. Step 1: Write the proportion equation
   76,850.81 : 106,053.89 = 42,859.33 : x
2. Step 2: Convert to fraction form
   76,850.81/106,053.89 = 42,859.33/x
3. Step 3: Cross multiply
   76,850.81x = 106,053.89 × 42,859.33
4. Step 4: Simplify right side
   76,850.81x = 4,545,398,511.31
5. Step 5: Solve for x
   x = 4,545,398,511.31/76,850.81
6. Step 6: Final answer
   x = 59,145.75