Finding the Third Proportional to 19,307 and 28,790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,307 : 28,790.50 = 28,790.50 : x
2. Step 2: Convert to fraction form
   19,307/28,790.50 = 28,790.50/x
3. Step 3: Cross multiply
   19,307x = 28,790.50 × 28,790.50
4. Step 4: Simplify right side
   19,307x = 828,892,890.25
5. Step 5: Solve for x
   x = 828,892,890.25/19,307
6. Step 6: Final answer
   x = 42,932.25