Finding the Fourth Proportional to 78,418.73, 108,218.33 and 42,608.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,418.73 : 108,218.33 = 42,608.84 : x
2. Step 2: Convert to fraction form
   78,418.73/108,218.33 = 42,608.84/x
3. Step 3: Cross multiply
   78,418.73x = 108,218.33 × 42,608.84
4. Step 4: Simplify right side
   78,418.73x = 4,611,056,753.90
5. Step 5: Solve for x
   x = 4,611,056,753.90/78,418.73
6. Step 6: Final answer
   x = 58,800.46