Finding the Third Proportional to 19,709.50 and 28,830.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,709.50 : 28,830.75 = 28,830.75 : x
2. Step 2: Convert to fraction form
   19,709.50/28,830.75 = 28,830.75/x
3. Step 3: Cross multiply
   19,709.50x = 28,830.75 × 28,830.75
4. Step 4: Simplify right side
   19,709.50x = 831,212,145.56
5. Step 5: Solve for x
   x = 831,212,145.56/19,709.50
6. Step 6: Final answer
   x = 42,173.17