Finding the Fourth Proportional to 65,259.72, 90,072.90 and 36,981

Step by Step Solution

1. Step 1: Write the proportion equation
   65,259.72 : 90,072.90 = 36,981 : x
2. Step 2: Convert to fraction form
   65,259.72/90,072.90 = 36,981/x
3. Step 3: Cross multiply
   65,259.72x = 90,072.90 × 36,981
4. Step 4: Simplify right side
   65,259.72x = 3,330,985,914.90
5. Step 5: Solve for x
   x = 3,330,985,914.90/65,259.72
6. Step 6: Final answer
   x = 51,041.99