Finding the Third Proportional to 5,215,470.19 and 10,578,331.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215,470.19 : 10,578,331.69 = 10,578,331.69 : x
2. Step 2: Convert to fraction form
   5,215,470.19/10,578,331.69 = 10,578,331.69/x
3. Step 3: Cross multiply
   5,215,470.19x = 10,578,331.69 × 10,578,331.69
4. Step 4: Simplify right side
   5,215,470.19x = 111,901,101,290,766.59
5. Step 5: Solve for x
   x = 111,901,101,290,766.59/5,215,470.19
6. Step 6: Final answer
   x = 21,455,611.34