Finding the Third Proportional to 19,697.63 and 28,815.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,697.63 : 28,815.75 = 28,815.75 : x
2. Step 2: Convert to fraction form
   19,697.63/28,815.75 = 28,815.75/x
3. Step 3: Cross multiply
   19,697.63x = 28,815.75 × 28,815.75
4. Step 4: Simplify right side
   19,697.63x = 830,347,448.06
5. Step 5: Solve for x
   x = 830,347,448.06/19,697.63
6. Step 6: Final answer
   x = 42,154.70