Finding the Fourth Proportional to 71,819.82, 99,111.96 and 39,557.88

Step by Step Solution

1. Step 1: Write the proportion equation
   71,819.82 : 99,111.96 = 39,557.88 : x
2. Step 2: Convert to fraction form
   71,819.82/99,111.96 = 39,557.88/x
3. Step 3: Cross multiply
   71,819.82x = 99,111.96 × 39,557.88
4. Step 4: Simplify right side
   71,819.82x = 3,920,659,020.24
5. Step 5: Solve for x
   x = 3,920,659,020.24/71,819.82
6. Step 6: Final answer
   x = 54,590.21