Finding the Third Proportional to 9,979,424 and 21,002,080

Step by Step Solution

1. Step 1: Write the proportion equation
   9,979,424 : 21,002,080 = 21,002,080 : x
2. Step 2: Convert to fraction form
   9,979,424/21,002,080 = 21,002,080/x
3. Step 3: Cross multiply
   9,979,424x = 21,002,080 × 21,002,080
4. Step 4: Simplify right side
   9,979,424x = 441,087,364,326,400
5. Step 5: Solve for x
   x = 441,087,364,326,400/9,979,424
6. Step 6: Final answer
   x = 44,199,681.70