Finding the Third Proportional to 689,566.50 and 1,070,435.25

Step by Step Solution

1. Step 1: Write the proportion equation
   689,566.50 : 1,070,435.25 = 1,070,435.25 : x
2. Step 2: Convert to fraction form
   689,566.50/1,070,435.25 = 1,070,435.25/x
3. Step 3: Cross multiply
   689,566.50x = 1,070,435.25 × 1,070,435.25
4. Step 4: Simplify right side
   689,566.50x = 1,145,831,624,442.56
5. Step 5: Solve for x
   x = 1,145,831,624,442.56/689,566.50
6. Step 6: Final answer
   x = 1,661,669.50