Finding the Fourth Proportional to 40,156.61, 55,423.85 and 23,171.79

Step by Step Solution

1. Step 1: Write the proportion equation
   40,156.61 : 55,423.85 = 23,171.79 : x
2. Step 2: Convert to fraction form
   40,156.61/55,423.85 = 23,171.79/x
3. Step 3: Cross multiply
   40,156.61x = 55,423.85 × 23,171.79
4. Step 4: Simplify right side
   40,156.61x = 1,284,269,697.33
5. Step 5: Solve for x
   x = 1,284,269,697.33/40,156.61
6. Step 6: Final answer
   x = 31,981.53