Finding the Fourth Proportional to 71,670.42, 98,905.05 and 39,839.22

Step by Step Solution

1. Step 1: Write the proportion equation
   71,670.42 : 98,905.05 = 39,839.22 : x
2. Step 2: Convert to fraction form
   71,670.42/98,905.05 = 39,839.22/x
3. Step 3: Cross multiply
   71,670.42x = 98,905.05 × 39,839.22
4. Step 4: Simplify right side
   71,670.42x = 3,940,300,046.06
5. Step 5: Solve for x
   x = 3,940,300,046.06/71,670.42
6. Step 6: Final answer
   x = 54,978.05