Finding the Fourth Proportional to 78,166.50, 107,869.77 and 42,356.22

Step by Step Solution

1. Step 1: Write the proportion equation
   78,166.50 : 107,869.77 = 42,356.22 : x
2. Step 2: Convert to fraction form
   78,166.50/107,869.77 = 42,356.22/x
3. Step 3: Cross multiply
   78,166.50x = 107,869.77 × 42,356.22
4. Step 4: Simplify right side
   78,166.50x = 4,568,955,709.47
5. Step 5: Solve for x
   x = 4,568,955,709.47/78,166.50
6. Step 6: Final answer
   x = 58,451.58