Finding the Fourth Proportional to 71,411.56, 98,544.38 and 39,580.18

Step by Step Solution

1. Step 1: Write the proportion equation
   71,411.56 : 98,544.38 = 39,580.18 : x
2. Step 2: Convert to fraction form
   71,411.56/98,544.38 = 39,580.18/x
3. Step 3: Cross multiply
   71,411.56x = 98,544.38 × 39,580.18
4. Step 4: Simplify right side
   71,411.56x = 3,900,404,298.39
5. Step 5: Solve for x
   x = 3,900,404,298.39/71,411.56
6. Step 6: Final answer
   x = 54,618.67