Finding the Third Proportional to 398,826.50 and 875,145

Step by Step Solution

1. Step 1: Write the proportion equation
   398,826.50 : 875,145 = 875,145 : x
2. Step 2: Convert to fraction form
   398,826.50/875,145 = 875,145/x
3. Step 3: Cross multiply
   398,826.50x = 875,145 × 875,145
4. Step 4: Simplify right side
   398,826.50x = 765,878,771,025
5. Step 5: Solve for x
   x = 765,878,771,025/398,826.50
6. Step 6: Final answer
   x = 1,920,330.70