Finding the Fourth Proportional to 65,388.72, 90,245.63 and 38,173.73

Step by Step Solution

1. Step 1: Write the proportion equation
   65,388.72 : 90,245.63 = 38,173.73 : x
2. Step 2: Convert to fraction form
   65,388.72/90,245.63 = 38,173.73/x
3. Step 3: Cross multiply
   65,388.72x = 90,245.63 × 38,173.73
4. Step 4: Simplify right side
   65,388.72x = 3,445,012,122.43
5. Step 5: Solve for x
   x = 3,445,012,122.43/65,388.72
6. Step 6: Final answer
   x = 52,685.11