Finding the Fourth Proportional to 65,469.24, 90,355.98 and 39,970.26

Step by Step Solution

1. Step 1: Write the proportion equation
   65,469.24 : 90,355.98 = 39,970.26 : x
2. Step 2: Convert to fraction form
   65,469.24/90,355.98 = 39,970.26/x
3. Step 3: Cross multiply
   65,469.24x = 90,355.98 × 39,970.26
4. Step 4: Simplify right side
   65,469.24x = 3,611,552,013.15
5. Step 5: Solve for x
   x = 3,611,552,013.15/65,469.24
6. Step 6: Final answer
   x = 55,164.10