Finding the Third Proportional to 521,705.50 and 698,804

Step by Step Solution

1. Step 1: Write the proportion equation
   521,705.50 : 698,804 = 698,804 : x
2. Step 2: Convert to fraction form
   521,705.50/698,804 = 698,804/x
3. Step 3: Cross multiply
   521,705.50x = 698,804 × 698,804
4. Step 4: Simplify right side
   521,705.50x = 488,327,030,416
5. Step 5: Solve for x
   x = 488,327,030,416/521,705.50
6. Step 6: Final answer
   x = 936,020.48