Finding the Fourth Proportional to 78,458.49, 108,269.73 and 42,647.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,458.49 : 108,269.73 = 42,647.76 : x
2. Step 2: Convert to fraction form
   78,458.49/108,269.73 = 42,647.76/x
3. Step 3: Cross multiply
   78,458.49x = 108,269.73 × 42,647.76
4. Step 4: Simplify right side
   78,458.49x = 4,617,461,460.30
5. Step 5: Solve for x
   x = 4,617,461,460.30/78,458.49
6. Step 6: Final answer
   x = 58,852.29