Finding the Fourth Proportional to 72,166.24, 99,587.70 and 40,338.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,166.24 : 99,587.70 = 40,338.10 : x
2. Step 2: Convert to fraction form
   72,166.24/99,587.70 = 40,338.10/x
3. Step 3: Cross multiply
   72,166.24x = 99,587.70 × 40,338.10
4. Step 4: Simplify right side
   72,166.24x = 4,017,178,601.37
5. Step 5: Solve for x
   x = 4,017,178,601.37/72,166.24
6. Step 6: Final answer
   x = 55,665.62