Finding the Third Proportional to 690,368,981.34 and 1,509,875,665.31

Step by Step Solution

1. Step 1: Write the proportion equation
   690,368,981.34 : 1,509,875,665.31 = 1,509,875,665.31 : x
2. Step 2: Convert to fraction form
   690,368,981.34/1,509,875,665.31 = 1,509,875,665.31/x
3. Step 3: Cross multiply
   690,368,981.34x = 1,509,875,665.31 × 1,509,875,665.31
4. Step 4: Simplify right side
   690,368,981.34x = 2,279,724,524,702,864,640
5. Step 5: Solve for x
   x = 2,279,724,524,702,864,640/690,368,981.34
6. Step 6: Final answer
   x = 3,302,182,725.92