Finding the Third Proportional to 28,218.75 and 42,190.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,218.75 : 42,190.50 = 42,190.50 : x
2. Step 2: Convert to fraction form
   28,218.75/42,190.50 = 42,190.50/x
3. Step 3: Cross multiply
   28,218.75x = 42,190.50 × 42,190.50
4. Step 4: Simplify right side
   28,218.75x = 1,780,038,290.25
5. Step 5: Solve for x
   x = 1,780,038,290.25/28,218.75
6. Step 6: Final answer
   x = 63,079.98