Finding the Fourth Proportional to 78,649.80, 108,537.99 and 42,839.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78,649.80 : 108,537.99 = 42,839.83 : x
2. Step 2: Convert to fraction form
   78,649.80/108,537.99 = 42,839.83/x
3. Step 3: Cross multiply
   78,649.80x = 108,537.99 × 42,839.83
4. Step 4: Simplify right side
   78,649.80x = 4,649,749,040.14
5. Step 5: Solve for x
   x = 4,649,749,040.14/78,649.80
6. Step 6: Final answer
   x = 59,119.65