Finding the Fourth Proportional to 247,941, 371,969.82 and 81,729

Step by Step Solution

1. Step 1: Write the proportion equation
   247,941 : 371,969.82 = 81,729 : x
2. Step 2: Convert to fraction form
   247,941/371,969.82 = 81,729/x
3. Step 3: Cross multiply
   247,941x = 371,969.82 × 81,729
4. Step 4: Simplify right side
   247,941x = 30,400,721,418.78
5. Step 5: Solve for x
   x = 30,400,721,418.78/247,941
6. Step 6: Final answer
   x = 122,612.72