Finding the Third Proportional to 28,678.50 and 67,474.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,678.50 : 67,474.50 = 67,474.50 : x
2. Step 2: Convert to fraction form
   28,678.50/67,474.50 = 67,474.50/x
3. Step 3: Cross multiply
   28,678.50x = 67,474.50 × 67,474.50
4. Step 4: Simplify right side
   28,678.50x = 4,552,808,150.25
5. Step 5: Solve for x
   x = 4,552,808,150.25/28,678.50
6. Step 6: Final answer
   x = 158,753.36