Finding the Third Proportional to 419,117.50 and 857,603

Step by Step Solution

1. Step 1: Write the proportion equation
   419,117.50 : 857,603 = 857,603 : x
2. Step 2: Convert to fraction form
   419,117.50/857,603 = 857,603/x
3. Step 3: Cross multiply
   419,117.50x = 857,603 × 857,603
4. Step 4: Simplify right side
   419,117.50x = 735,482,905,609
5. Step 5: Solve for x
   x = 735,482,905,609/419,117.50
6. Step 6: Final answer
   x = 1,754,837.02