Finding the Third Proportional to 698,071.50 and 1,078,735.50

Step by Step Solution

1. Step 1: Write the proportion equation
   698,071.50 : 1,078,735.50 = 1,078,735.50 : x
2. Step 2: Convert to fraction form
   698,071.50/1,078,735.50 = 1,078,735.50/x
3. Step 3: Cross multiply
   698,071.50x = 1,078,735.50 × 1,078,735.50
4. Step 4: Simplify right side
   698,071.50x = 1,163,670,278,960.25
5. Step 5: Solve for x
   x = 1,163,670,278,960.25/698,071.50
6. Step 6: Final answer
   x = 1,666,978.64