Finding the Third Proportional to 11,137,316 and 17,721,836.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,137,316 : 17,721,836.50 = 17,721,836.50 : x
2. Step 2: Convert to fraction form
   11,137,316/17,721,836.50 = 17,721,836.50/x
3. Step 3: Cross multiply
   11,137,316x = 17,721,836.50 × 17,721,836.50
4. Step 4: Simplify right side
   11,137,316x = 314,063,488,932,732.25
5. Step 5: Solve for x
   x = 314,063,488,932,732.25/11,137,316
6. Step 6: Final answer
   x = 28,199,207.86