Finding the Fourth Proportional to 78,719.10, 108,630.73 and 42,908.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,719.10 : 108,630.73 = 42,908.80 : x
2. Step 2: Convert to fraction form
   78,719.10/108,630.73 = 42,908.80/x
3. Step 3: Cross multiply
   78,719.10x = 108,630.73 × 42,908.80
4. Step 4: Simplify right side
   78,719.10x = 4,661,214,267.42
5. Step 5: Solve for x
   x = 4,661,214,267.42/78,719.10
6. Step 6: Final answer
   x = 59,213.26