Finding the Fourth Proportional to 78,718.14, 108,630.45 and 42,908.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,718.14 : 108,630.45 = 42,908.04 : x
2. Step 2: Convert to fraction form
   78,718.14/108,630.45 = 42,908.04/x
3. Step 3: Cross multiply
   78,718.14x = 108,630.45 × 42,908.04
4. Step 4: Simplify right side
   78,718.14x = 4,661,119,693.82
5. Step 5: Solve for x
   x = 4,661,119,693.82/78,718.14
6. Step 6: Final answer
   x = 59,212.78