Finding the Third Proportional to 1,290,105,860 and 1,992,191,460

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290,105,860 : 1,992,191,460 = 1,992,191,460 : x
2. Step 2: Convert to fraction form
   1,290,105,860/1,992,191,460 = 1,992,191,460/x
3. Step 3: Cross multiply
   1,290,105,860x = 1,992,191,460 × 1,992,191,460
4. Step 4: Simplify right side
   1,290,105,860x = 3,968,826,813,296,931,840
5. Step 5: Solve for x
   x = 3,968,826,813,296,931,840/1,290,105,860
6. Step 6: Final answer
   x = 3,076,357,480.69