Finding the Third Proportional to 5,721,246 and 8,640,189

Step by Step Solution

1. Step 1: Write the proportion equation
   5,721,246 : 8,640,189 = 8,640,189 : x
2. Step 2: Convert to fraction form
   5,721,246/8,640,189 = 8,640,189/x
3. Step 3: Cross multiply
   5,721,246x = 8,640,189 × 8,640,189
4. Step 4: Simplify right side
   5,721,246x = 74,652,865,955,721
5. Step 5: Solve for x
   x = 74,652,865,955,721/5,721,246
6. Step 6: Final answer
   x = 13,048,357.99