Finding the Fourth Proportional to 65,688.24, 90,657 and 37,389.36

Step by Step Solution

1. Step 1: Write the proportion equation
   65,688.24 : 90,657 = 37,389.36 : x
2. Step 2: Convert to fraction form
   65,688.24/90,657 = 37,389.36/x
3. Step 3: Cross multiply
   65,688.24x = 90,657 × 37,389.36
4. Step 4: Simplify right side
   65,688.24x = 3,389,607,209.52
5. Step 5: Solve for x
   x = 3,389,607,209.52/65,688.24
6. Step 6: Final answer
   x = 51,601.43