Finding the Fourth Proportional to 72,171, 99,595.98 and 40,339.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,171 : 99,595.98 = 40,339.22 : x
2. Step 2: Convert to fraction form
   72,171/99,595.98 = 40,339.22/x
3. Step 3: Cross multiply
   72,171x = 99,595.98 × 40,339.22
4. Step 4: Simplify right side
   72,171x = 4,017,623,650.36
5. Step 5: Solve for x
   x = 4,017,623,650.36/72,171
6. Step 6: Final answer
   x = 55,668.12