Finding the Third Proportional to 69,300.56 and 76,909.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,300.56 : 76,909.50 = 76,909.50 : x
2. Step 2: Convert to fraction form
   69,300.56/76,909.50 = 76,909.50/x
3. Step 3: Cross multiply
   69,300.56x = 76,909.50 × 76,909.50
4. Step 4: Simplify right side
   69,300.56x = 5,915,071,190.25
5. Step 5: Solve for x
   x = 5,915,071,190.25/69,300.56
6. Step 6: Final answer
   x = 85,353.87