Finding the Fourth Proportional to 72,751.30, 109,069.35 and 39,919.30

Step by Step Solution

1. Step 1: Write the proportion equation
   72,751.30 : 109,069.35 = 39,919.30 : x
2. Step 2: Convert to fraction form
   72,751.30/109,069.35 = 39,919.30/x
3. Step 3: Cross multiply
   72,751.30x = 109,069.35 × 39,919.30
4. Step 4: Simplify right side
   72,751.30x = 4,353,972,103.46
5. Step 5: Solve for x
   x = 4,353,972,103.46/72,751.30
6. Step 6: Final answer
   x = 59,847.34