Finding the Fourth Proportional to 78,581.36, 108,439.98 and 42,770.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,581.36 : 108,439.98 = 42,770.54 : x
2. Step 2: Convert to fraction form
   78,581.36/108,439.98 = 42,770.54/x
3. Step 3: Cross multiply
   78,581.36x = 108,439.98 × 42,770.54
4. Step 4: Simplify right side
   78,581.36x = 4,638,036,502.19
5. Step 5: Solve for x
   x = 4,638,036,502.19/78,581.36
6. Step 6: Final answer
   x = 59,022.10