Finding the Fourth Proportional to 71,760.06, 99,028.17 and 39,928.41

Step by Step Solution

1. Step 1: Write the proportion equation
   71,760.06 : 99,028.17 = 39,928.41 : x
2. Step 2: Convert to fraction form
   71,760.06/99,028.17 = 39,928.41/x
3. Step 3: Cross multiply
   71,760.06x = 99,028.17 × 39,928.41
4. Step 4: Simplify right side
   71,760.06x = 3,954,037,373.31
5. Step 5: Solve for x
   x = 3,954,037,373.31/71,760.06
6. Step 6: Final answer
   x = 55,100.81