Finding the Fourth Proportional to 78,620.47, 108,496.17 and 42,810.73

Step by Step Solution

1. Step 1: Write the proportion equation
   78,620.47 : 108,496.17 = 42,810.73 : x
2. Step 2: Convert to fraction form
   78,620.47/108,496.17 = 42,810.73/x
3. Step 3: Cross multiply
   78,620.47x = 108,496.17 × 42,810.73
4. Step 4: Simplify right side
   78,620.47x = 4,644,799,968.66
5. Step 5: Solve for x
   x = 4,644,799,968.66/78,620.47
6. Step 6: Final answer
   x = 59,078.76