Finding the Third Proportional to 36,990 and 57,211.31

Step by Step Solution

1. Step 1: Write the proportion equation
   36,990 : 57,211.31 = 57,211.31 : x
2. Step 2: Convert to fraction form
   36,990/57,211.31 = 57,211.31/x
3. Step 3: Cross multiply
   36,990x = 57,211.31 × 57,211.31
4. Step 4: Simplify right side
   36,990x = 3,273,134,277.97
5. Step 5: Solve for x
   x = 3,273,134,277.97/36,990
6. Step 6: Final answer
   x = 88,487.00