Finding the Third Proportional to 9,231,729 and 21,369,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,231,729 : 21,369,781.50 = 21,369,781.50 : x
2. Step 2: Convert to fraction form
   9,231,729/21,369,781.50 = 21,369,781.50/x
3. Step 3: Cross multiply
   9,231,729x = 21,369,781.50 × 21,369,781.50
4. Step 4: Simplify right side
   9,231,729x = 456,667,561,357,742.25
5. Step 5: Solve for x
   x = 456,667,561,357,742.25/9,231,729
6. Step 6: Final answer
   x = 49,467,175.80