Finding the Third Proportional to 18,948 and 28,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,948 : 28,421.50 = 28,421.50 : x
2. Step 2: Convert to fraction form
   18,948/28,421.50 = 28,421.50/x
3. Step 3: Cross multiply
   18,948x = 28,421.50 × 28,421.50
4. Step 4: Simplify right side
   18,948x = 807,781,662.25
5. Step 5: Solve for x
   x = 807,781,662.25/18,948
6. Step 6: Final answer
   x = 42,631.50