Finding the Third Proportional to 398,848.50 and 875,191.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,848.50 : 875,191.50 = 875,191.50 : x
2. Step 2: Convert to fraction form
   398,848.50/875,191.50 = 875,191.50/x
3. Step 3: Cross multiply
   398,848.50x = 875,191.50 × 875,191.50
4. Step 4: Simplify right side
   398,848.50x = 765,960,161,672.25
5. Step 5: Solve for x
   x = 765,960,161,672.25/398,848.50
6. Step 6: Final answer
   x = 1,920,428.84