Finding the Third Proportional to 521,703 and 698,800.50

Step by Step Solution

1. Step 1: Write the proportion equation
   521,703 : 698,800.50 = 698,800.50 : x
2. Step 2: Convert to fraction form
   521,703/698,800.50 = 698,800.50/x
3. Step 3: Cross multiply
   521,703x = 698,800.50 × 698,800.50
4. Step 4: Simplify right side
   521,703x = 488,322,138,800.25
5. Step 5: Solve for x
   x = 488,322,138,800.25/521,703
6. Step 6: Final answer
   x = 936,015.59