Finding the Third Proportional to 87,990 and 132,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,990 : 132,409.50 = 132,409.50 : x
2. Step 2: Convert to fraction form
   87,990/132,409.50 = 132,409.50/x
3. Step 3: Cross multiply
   87,990x = 132,409.50 × 132,409.50
4. Step 4: Simplify right side
   87,990x = 17,532,275,690.25
5. Step 5: Solve for x
   x = 17,532,275,690.25/87,990
6. Step 6: Final answer
   x = 199,253.05