Finding the Fourth Proportional to 71,801.64, 99,083.94 and 39,969.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,801.64 : 99,083.94 = 39,969.48 : x
2. Step 2: Convert to fraction form
   71,801.64/99,083.94 = 39,969.48/x
3. Step 3: Cross multiply
   71,801.64x = 99,083.94 × 39,969.48
4. Step 4: Simplify right side
   71,801.64x = 3,960,333,558.15
5. Step 5: Solve for x
   x = 3,960,333,558.15/71,801.64
6. Step 6: Final answer
   x = 55,156.59