Finding the Fourth Proportional to 65,257.98, 90,048.42 and 38,394.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,257.98 : 90,048.42 = 38,394.60 : x
2. Step 2: Convert to fraction form
   65,257.98/90,048.42 = 38,394.60/x
3. Step 3: Cross multiply
   65,257.98x = 90,048.42 × 38,394.60
4. Step 4: Simplify right side
   65,257.98x = 3,457,373,066.53
5. Step 5: Solve for x
   x = 3,457,373,066.53/65,257.98
6. Step 6: Final answer
   x = 52,980.08