Finding the Fourth Proportional to 78,718.01, 108,630.18 and 42,908.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,718.01 : 108,630.18 = 42,908.03 : x
2. Step 2: Convert to fraction form
   78,718.01/108,630.18 = 42,908.03/x
3. Step 3: Cross multiply
   78,718.01x = 108,630.18 × 42,908.03
4. Step 4: Simplify right side
   78,718.01x = 4,661,107,022.35
5. Step 5: Solve for x
   x = 4,661,107,022.35/78,718.01
6. Step 6: Final answer
   x = 59,212.71