Finding the Fourth Proportional to 78,617.84, 108,494.55 and 42,809.81

Step by Step Solution

1. Step 1: Write the proportion equation
   78,617.84 : 108,494.55 = 42,809.81 : x
2. Step 2: Convert to fraction form
   78,617.84/108,494.55 = 42,809.81/x
3. Step 3: Cross multiply
   78,617.84x = 108,494.55 × 42,809.81
4. Step 4: Simplify right side
   78,617.84x = 4,644,630,529.06
5. Step 5: Solve for x
   x = 4,644,630,529.06/78,617.84
6. Step 6: Final answer
   x = 59,078.59