Finding the Third Proportional to 18,985.50 and 28,478.25

Step by Step Solution

1. Step 1: Write the proportion equation
   18,985.50 : 28,478.25 = 28,478.25 : x
2. Step 2: Convert to fraction form
   18,985.50/28,478.25 = 28,478.25/x
3. Step 3: Cross multiply
   18,985.50x = 28,478.25 × 28,478.25
4. Step 4: Simplify right side
   18,985.50x = 811,010,723.06
5. Step 5: Solve for x
   x = 811,010,723.06/18,985.50
6. Step 6: Final answer
   x = 42,717.38