Finding the Third Proportional to 830,428.50 and 1,245,643.50

Step by Step Solution

1. Step 1: Write the proportion equation
   830,428.50 : 1,245,643.50 = 1,245,643.50 : x
2. Step 2: Convert to fraction form
   830,428.50/1,245,643.50 = 1,245,643.50/x
3. Step 3: Cross multiply
   830,428.50x = 1,245,643.50 × 1,245,643.50
4. Step 4: Simplify right side
   830,428.50x = 1,551,627,729,092.25
5. Step 5: Solve for x
   x = 1,551,627,729,092.25/830,428.50
6. Step 6: Final answer
   x = 1,868,466.38