Finding the Fourth Proportional to 71,767.69, 99,038.10 and 39,936.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,767.69 : 99,038.10 = 39,936.31 : x
2. Step 2: Convert to fraction form
   71,767.69/99,038.10 = 39,936.31/x
3. Step 3: Cross multiply
   71,767.69x = 99,038.10 × 39,936.31
4. Step 4: Simplify right side
   71,767.69x = 3,955,216,263.41
5. Step 5: Solve for x
   x = 3,955,216,263.41/71,767.69
6. Step 6: Final answer
   x = 55,111.38