Finding the Third Proportional to 689,355 and 992,883.75

Step by Step Solution

1. Step 1: Write the proportion equation
   689,355 : 992,883.75 = 992,883.75 : x
2. Step 2: Convert to fraction form
   689,355/992,883.75 = 992,883.75/x
3. Step 3: Cross multiply
   689,355x = 992,883.75 × 992,883.75
4. Step 4: Simplify right side
   689,355x = 985,818,141,014.06
5. Step 5: Solve for x
   x = 985,818,141,014.06/689,355
6. Step 6: Final answer
   x = 1,430,058.74