Finding the Third Proportional to 9,186,128 and 21,456,124

Step by Step Solution

1. Step 1: Write the proportion equation
   9,186,128 : 21,456,124 = 21,456,124 : x
2. Step 2: Convert to fraction form
   9,186,128/21,456,124 = 21,456,124/x
3. Step 3: Cross multiply
   9,186,128x = 21,456,124 × 21,456,124
4. Step 4: Simplify right side
   9,186,128x = 460,365,257,103,376
5. Step 5: Solve for x
   x = 460,365,257,103,376/9,186,128
6. Step 6: Final answer
   x = 50,115,266.97