Finding the Fourth Proportional to 78,456.49, 108,270.34 and 42,646.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.49 : 108,270.34 = 42,646.50 : x
2. Step 2: Convert to fraction form
   78,456.49/108,270.34 = 42,646.50/x
3. Step 3: Cross multiply
   78,456.49x = 108,270.34 × 42,646.50
4. Step 4: Simplify right side
   78,456.49x = 4,617,351,038.15
5. Step 5: Solve for x
   x = 4,617,351,038.15/78,456.49
6. Step 6: Final answer
   x = 58,852.38