Finding the Fourth Proportional to 78,622.50, 108,495.80 and 42,812.43

Step by Step Solution

1. Step 1: Write the proportion equation
   78,622.50 : 108,495.80 = 42,812.43 : x
2. Step 2: Convert to fraction form
   78,622.50/108,495.80 = 42,812.43/x
3. Step 3: Cross multiply
   78,622.50x = 108,495.80 × 42,812.43
4. Step 4: Simplify right side
   78,622.50x = 4,644,968,628.73
5. Step 5: Solve for x
   x = 4,644,968,628.73/78,622.50
6. Step 6: Final answer
   x = 59,079.38