Finding the Fourth Proportional to 65,391.21, 90,216.63 and 42,743.27

Step by Step Solution

1. Step 1: Write the proportion equation
   65,391.21 : 90,216.63 = 42,743.27 : x
2. Step 2: Convert to fraction form
   65,391.21/90,216.63 = 42,743.27/x
3. Step 3: Cross multiply
   65,391.21x = 90,216.63 × 42,743.27
4. Step 4: Simplify right side
   65,391.21x = 3,856,153,323.50
5. Step 5: Solve for x
   x = 3,856,153,323.50/65,391.21
6. Step 6: Final answer
   x = 58,970.51