Finding the Fourth Proportional to 78,559.43, 108,412.38 and 42,749.20

Step by Step Solution

1. Step 1: Write the proportion equation
   78,559.43 : 108,412.38 = 42,749.20 : x
2. Step 2: Convert to fraction form
   78,559.43/108,412.38 = 42,749.20/x
3. Step 3: Cross multiply
   78,559.43x = 108,412.38 × 42,749.20
4. Step 4: Simplify right side
   78,559.43x = 4,634,541,759.29
5. Step 5: Solve for x
   x = 4,634,541,759.29/78,559.43
6. Step 6: Final answer
   x = 58,994.09