Finding the Third Proportional to 661,813.50 and 931,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   661,813.50 : 931,969.50 = 931,969.50 : x
2. Step 2: Convert to fraction form
   661,813.50/931,969.50 = 931,969.50/x
3. Step 3: Cross multiply
   661,813.50x = 931,969.50 × 931,969.50
4. Step 4: Simplify right side
   661,813.50x = 868,567,148,930.25
5. Step 5: Solve for x
   x = 868,567,148,930.25/661,813.50
6. Step 6: Final answer
   x = 1,312,404.70