Finding the Third Proportional to 28,689 and 42,158.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,689 : 42,158.25 = 42,158.25 : x
2. Step 2: Convert to fraction form
   28,689/42,158.25 = 42,158.25/x
3. Step 3: Cross multiply
   28,689x = 42,158.25 × 42,158.25
4. Step 4: Simplify right side
   28,689x = 1,777,318,043.06
5. Step 5: Solve for x
   x = 1,777,318,043.06/28,689
6. Step 6: Final answer
   x = 61,951.20