Finding the Third Proportional to 58,689 and 87,808.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,689 : 87,808.50 = 87,808.50 : x
2. Step 2: Convert to fraction form
   58,689/87,808.50 = 87,808.50/x
3. Step 3: Cross multiply
   58,689x = 87,808.50 × 87,808.50
4. Step 4: Simplify right side
   58,689x = 7,710,332,672.25
5. Step 5: Solve for x
   x = 7,710,332,672.25/58,689
6. Step 6: Final answer
   x = 131,376.11