Finding the Fourth Proportional to 78,528.72, 108,368.52 and 42,719

Step by Step Solution

1. Step 1: Write the proportion equation
   78,528.72 : 108,368.52 = 42,719 : x
2. Step 2: Convert to fraction form
   78,528.72/108,368.52 = 42,719/x
3. Step 3: Cross multiply
   78,528.72x = 108,368.52 × 42,719
4. Step 4: Simplify right side
   78,528.72x = 4,629,394,805.88
5. Step 5: Solve for x
   x = 4,629,394,805.88/78,528.72
6. Step 6: Final answer
   x = 58,951.61