Finding the Fourth Proportional to 65,571.48, 90,587.34 and 42,964.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,571.48 : 90,587.34 = 42,964.20 : x
2. Step 2: Convert to fraction form
   65,571.48/90,587.34 = 42,964.20/x
3. Step 3: Cross multiply
   65,571.48x = 90,587.34 × 42,964.20
4. Step 4: Simplify right side
   65,571.48x = 3,892,012,593.23
5. Step 5: Solve for x
   x = 3,892,012,593.23/65,571.48
6. Step 6: Final answer
   x = 59,355.27