Finding the Third Proportional to 9,971,021.50 and 21,689,063

Step by Step Solution

1. Step 1: Write the proportion equation
   9,971,021.50 : 21,689,063 = 21,689,063 : x
2. Step 2: Convert to fraction form
   9,971,021.50/21,689,063 = 21,689,063/x
3. Step 3: Cross multiply
   9,971,021.50x = 21,689,063 × 21,689,063
4. Step 4: Simplify right side
   9,971,021.50x = 470,415,453,817,969
5. Step 5: Solve for x
   x = 470,415,453,817,969/9,971,021.50
6. Step 6: Final answer
   x = 47,178,260.91