Finding the Fourth Proportional to 65,447.39, 90,325.83 and 39,948.39

Step by Step Solution

1. Step 1: Write the proportion equation
   65,447.39 : 90,325.83 = 39,948.39 : x
2. Step 2: Convert to fraction form
   65,447.39/90,325.83 = 39,948.39/x
3. Step 3: Cross multiply
   65,447.39x = 90,325.83 × 39,948.39
4. Step 4: Simplify right side
   65,447.39x = 3,608,371,633.72
5. Step 5: Solve for x
   x = 3,608,371,633.72/65,447.39
6. Step 6: Final answer
   x = 55,133.93