Finding the Third Proportional to 698,991,386.50 and 1,085,317,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   698,991,386.50 : 1,085,317,382.50 = 1,085,317,382.50 : x
2. Step 2: Convert to fraction form
   698,991,386.50/1,085,317,382.50 = 1,085,317,382.50/x
3. Step 3: Cross multiply
   698,991,386.50x = 1,085,317,382.50 × 1,085,317,382.50
4. Step 4: Simplify right side
   698,991,386.50x = 1,177,913,820,756,651,264
5. Step 5: Solve for x
   x = 1,177,913,820,756,651,264/698,991,386.50
6. Step 6: Final answer
   x = 1,685,162,140.06