Finding the Fourth Proportional to 71,802.84, 99,091.38 and 39,971.73

Step by Step Solution

1. Step 1: Write the proportion equation
   71,802.84 : 99,091.38 = 39,971.73 : x
2. Step 2: Convert to fraction form
   71,802.84/99,091.38 = 39,971.73/x
3. Step 3: Cross multiply
   71,802.84x = 99,091.38 × 39,971.73
4. Step 4: Simplify right side
   71,802.84x = 3,960,853,886.69
5. Step 5: Solve for x
   x = 3,960,853,886.69/71,802.84
6. Step 6: Final answer
   x = 55,162.91