Finding the Third Proportional to 680,985 and 1,030,945.50

Step by Step Solution

1. Step 1: Write the proportion equation
   680,985 : 1,030,945.50 = 1,030,945.50 : x
2. Step 2: Convert to fraction form
   680,985/1,030,945.50 = 1,030,945.50/x
3. Step 3: Cross multiply
   680,985x = 1,030,945.50 × 1,030,945.50
4. Step 4: Simplify right side
   680,985x = 1,062,848,623,970.25
5. Step 5: Solve for x
   x = 1,062,848,623,970.25/680,985
6. Step 6: Final answer
   x = 1,560,751.89