Finding the Third Proportional to 39,989.25 and 87,511.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,989.25 : 87,511.50 = 87,511.50 : x
2. Step 2: Convert to fraction form
   39,989.25/87,511.50 = 87,511.50/x
3. Step 3: Cross multiply
   39,989.25x = 87,511.50 × 87,511.50
4. Step 4: Simplify right side
   39,989.25x = 7,658,262,632.25
5. Step 5: Solve for x
   x = 7,658,262,632.25/39,989.25
6. Step 6: Final answer
   x = 191,508.03