Finding the Third Proportional to 28,779 and 42,136.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,779 : 42,136.50 = 42,136.50 : x
2. Step 2: Convert to fraction form
   28,779/42,136.50 = 42,136.50/x
3. Step 3: Cross multiply
   28,779x = 42,136.50 × 42,136.50
4. Step 4: Simplify right side
   28,779x = 1,775,484,632.25
5. Step 5: Solve for x
   x = 1,775,484,632.25/28,779
6. Step 6: Final answer
   x = 61,693.76