Finding the Third Proportional to 12,352,990 and 17,820,816

Step by Step Solution

1. Step 1: Write the proportion equation
   12,352,990 : 17,820,816 = 17,820,816 : x
2. Step 2: Convert to fraction form
   12,352,990/17,820,816 = 17,820,816/x
3. Step 3: Cross multiply
   12,352,990x = 17,820,816 × 17,820,816
4. Step 4: Simplify right side
   12,352,990x = 317,581,482,905,856
5. Step 5: Solve for x
   x = 317,581,482,905,856/12,352,990
6. Step 6: Final answer
   x = 25,708,875.58