Finding the Fourth Proportional to 78,622.81, 108,495.78 and 42,812.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,622.81 : 108,495.78 = 42,812.68 : x
2. Step 2: Convert to fraction form
   78,622.81/108,495.78 = 42,812.68/x
3. Step 3: Cross multiply
   78,622.81x = 108,495.78 × 42,812.68
4. Step 4: Simplify right side
   78,622.81x = 4,644,995,110.49
5. Step 5: Solve for x
   x = 4,644,995,110.49/78,622.81
6. Step 6: Final answer
   x = 59,079.48