Finding the Third Proportional to 28,915.50 and 42,142.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,915.50 : 42,142.50 = 42,142.50 : x
2. Step 2: Convert to fraction form
   28,915.50/42,142.50 = 42,142.50/x
3. Step 3: Cross multiply
   28,915.50x = 42,142.50 × 42,142.50
4. Step 4: Simplify right side
   28,915.50x = 1,775,990,306.25
5. Step 5: Solve for x
   x = 1,775,990,306.25/28,915.50
6. Step 6: Final answer
   x = 61,420.01