Finding the Fourth Proportional to 78,456.93, 108,272.67 and 42,649.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.93 : 108,272.67 = 42,649.35 : x
2. Step 2: Convert to fraction form
   78,456.93/108,272.67 = 42,649.35/x
3. Step 3: Cross multiply
   78,456.93x = 108,272.67 × 42,649.35
4. Step 4: Simplify right side
   78,456.93x = 4,617,758,998.26
5. Step 5: Solve for x
   x = 4,617,758,998.26/78,456.93
6. Step 6: Final answer
   x = 58,857.25