Finding the Fourth Proportional to 71,412.31, 98,552.22 and 40,788.09

Step by Step Solution

1. Step 1: Write the proportion equation
   71,412.31 : 98,552.22 = 40,788.09 : x
2. Step 2: Convert to fraction form
   71,412.31/98,552.22 = 40,788.09/x
3. Step 3: Cross multiply
   71,412.31x = 98,552.22 × 40,788.09
4. Step 4: Simplify right side
   71,412.31x = 4,019,756,819.06
5. Step 5: Solve for x
   x = 4,019,756,819.06/71,412.31
6. Step 6: Final answer
   x = 56,289.41