Finding the Fourth Proportional to 71,515, 98,690.37 and 39,683.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,515 : 98,690.37 = 39,683.82 : x
2. Step 2: Convert to fraction form
   71,515/98,690.37 = 39,683.82/x
3. Step 3: Cross multiply
   71,515x = 98,690.37 × 39,683.82
4. Step 4: Simplify right side
   71,515x = 3,916,410,878.81
5. Step 5: Solve for x
   x = 3,916,410,878.81/71,515
6. Step 6: Final answer
   x = 54,763.49