Finding the Third Proportional to 9,691,864.50 and 21,144,129

Step by Step Solution

1. Step 1: Write the proportion equation
   9,691,864.50 : 21,144,129 = 21,144,129 : x
2. Step 2: Convert to fraction form
   9,691,864.50/21,144,129 = 21,144,129/x
3. Step 3: Cross multiply
   9,691,864.50x = 21,144,129 × 21,144,129
4. Step 4: Simplify right side
   9,691,864.50x = 447,074,191,168,641
5. Step 5: Solve for x
   x = 447,074,191,168,641/9,691,864.50
6. Step 6: Final answer
   x = 46,128,811.56