Finding the Third Proportional to 11,490,390 and 17,816,238

Step by Step Solution

1. Step 1: Write the proportion equation
   11,490,390 : 17,816,238 = 17,816,238 : x
2. Step 2: Convert to fraction form
   11,490,390/17,816,238 = 17,816,238/x
3. Step 3: Cross multiply
   11,490,390x = 17,816,238 × 17,816,238
4. Step 4: Simplify right side
   11,490,390x = 317,418,336,472,644
5. Step 5: Solve for x
   x = 317,418,336,472,644/11,490,390
6. Step 6: Final answer
   x = 27,624,679.10