Finding the Third Proportional to 19,690,979,772 and 42,368,460,243

Step by Step Solution

1. Step 1: Write the proportion equation
   19,690,979,772 : 42,368,460,243 = 42,368,460,243 : x
2. Step 2: Convert to fraction form
   19,690,979,772/42,368,460,243 = 42,368,460,243/x
3. Step 3: Cross multiply
   19,690,979,772x = 42,368,460,243 × 42,368,460,243
4. Step 4: Simplify right side
   19,690,979,772x = 1,795,086,423,362,671,738,880
5. Step 5: Solve for x
   x = 1,795,086,423,362,671,738,880/19,690,979,772
6. Step 6: Final answer
   x = 91,162,879,864.17