Finding the Fourth Proportional to 72,141.42, 99,556.92 and 40,312.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,141.42 : 99,556.92 = 40,312.38 : x
2. Step 2: Convert to fraction form
   72,141.42/99,556.92 = 40,312.38/x
3. Step 3: Cross multiply
   72,141.42x = 99,556.92 × 40,312.38
4. Step 4: Simplify right side
   72,141.42x = 4,013,376,390.67
5. Step 5: Solve for x
   x = 4,013,376,390.67/72,141.42
6. Step 6: Final answer
   x = 55,632.07