Finding the Fourth Proportional to 81,903.28, 113,040.30 and 47,443

Step by Step Solution

1. Step 1: Write the proportion equation
   81,903.28 : 113,040.30 = 47,443 : x
2. Step 2: Convert to fraction form
   81,903.28/113,040.30 = 47,443/x
3. Step 3: Cross multiply
   81,903.28x = 113,040.30 × 47,443
4. Step 4: Simplify right side
   81,903.28x = 5,362,970,952.90
5. Step 5: Solve for x
   x = 5,362,970,952.90/81,903.28
6. Step 6: Final answer
   x = 65,479.32