Finding the Fourth Proportional to 65,289.60, 90,098.72 and 36,609.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,289.60 : 90,098.72 = 36,609.12 : x
2. Step 2: Convert to fraction form
   65,289.60/90,098.72 = 36,609.12/x
3. Step 3: Cross multiply
   65,289.60x = 90,098.72 × 36,609.12
4. Step 4: Simplify right side
   65,289.60x = 3,298,434,852.33
5. Step 5: Solve for x
   x = 3,298,434,852.33/65,289.60
6. Step 6: Final answer
   x = 50,520.07