Finding the Fourth Proportional to 78,390.15, 108,180.41 and 42,582.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,390.15 : 108,180.41 = 42,582.21 : x
2. Step 2: Convert to fraction form
   78,390.15/108,180.41 = 42,582.21/x
3. Step 3: Cross multiply
   78,390.15x = 108,180.41 × 42,582.21
4. Step 4: Simplify right side
   78,390.15x = 4,606,560,936.51
5. Step 5: Solve for x
   x = 4,606,560,936.51/78,390.15
6. Step 6: Final answer
   x = 58,764.54