Finding the Fourth Proportional to 71,778.63, 99,053.53 and 39,947.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71,778.63 : 99,053.53 = 39,947.52 : x
2. Step 2: Convert to fraction form
   71,778.63/99,053.53 = 39,947.52/x
3. Step 3: Cross multiply
   71,778.63x = 99,053.53 × 39,947.52
4. Step 4: Simplify right side
   71,778.63x = 3,956,943,142.33
5. Step 5: Solve for x
   x = 3,956,943,142.33/71,778.63
6. Step 6: Final answer
   x = 55,127.03