Finding the Fourth Proportional to 71,844.51, 99,145.42 and 40,013.40

Step by Step Solution

1. Step 1: Write the proportion equation
   71,844.51 : 99,145.42 = 40,013.40 : x
2. Step 2: Convert to fraction form
   71,844.51/99,145.42 = 40,013.40/x
3. Step 3: Cross multiply
   71,844.51x = 99,145.42 × 40,013.40
4. Step 4: Simplify right side
   71,844.51x = 3,967,145,248.59
5. Step 5: Solve for x
   x = 3,967,145,248.59/71,844.51
6. Step 6: Final answer
   x = 55,218.49