Finding the Fourth Proportional to 78,788.25, 108,725.94 and 42,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,788.25 : 108,725.94 = 42,978.54 : x
2. Step 2: Convert to fraction form
   78,788.25/108,725.94 = 42,978.54/x
3. Step 3: Cross multiply
   78,788.25x = 108,725.94 × 42,978.54
4. Step 4: Simplify right side
   78,788.25x = 4,672,882,161.33
5. Step 5: Solve for x
   x = 4,672,882,161.33/78,788.25
6. Step 6: Final answer
   x = 59,309.38