Finding the Third Proportional to 28,218 and 42,189.38

Step by Step Solution

1. Step 1: Write the proportion equation
   28,218 : 42,189.38 = 42,189.38 : x
2. Step 2: Convert to fraction form
   28,218/42,189.38 = 42,189.38/x
3. Step 3: Cross multiply
   28,218x = 42,189.38 × 42,189.38
4. Step 4: Simplify right side
   28,218x = 1,779,943,362.89
5. Step 5: Solve for x
   x = 1,779,943,362.89/28,218
6. Step 6: Final answer
   x = 63,078.30