Finding the Third Proportional to 19,690,979,760 and 42,368,460,206.63

Step by Step Solution

1. Step 1: Write the proportion equation
   19,690,979,760 : 42,368,460,206.63 = 42,368,460,206.63 : x
2. Step 2: Convert to fraction form
   19,690,979,760/42,368,460,206.63 = 42,368,460,206.63/x
3. Step 3: Cross multiply
   19,690,979,760x = 42,368,460,206.63 × 42,368,460,206.63
4. Step 4: Simplify right side
   19,690,979,760x = 1,795,086,420,280,366,071,808
5. Step 5: Solve for x
   x = 1,795,086,420,280,366,071,808/19,690,979,760
6. Step 6: Final answer
   x = 91,162,879,763.19