Finding the Third Proportional to 1,680.12 and 4,339.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680.12 : 4,339.83 = 4,339.83 : x
2. Step 2: Convert to fraction form
   1,680.12/4,339.83 = 4,339.83/x
3. Step 3: Cross multiply
   1,680.12x = 4,339.83 × 4,339.83
4. Step 4: Simplify right side
   1,680.12x = 18,834,108.15
5. Step 5: Solve for x
   x = 18,834,108.15/1,680.12
6. Step 6: Final answer
   x = 11,210.00