Finding the Third Proportional to 9,131.13 and 19,649.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.13 : 19,649.31 = 19,649.31 : x
2. Step 2: Convert to fraction form
   9,131.13/19,649.31 = 19,649.31/x
3. Step 3: Cross multiply
   9,131.13x = 19,649.31 × 19,649.31
4. Step 4: Simplify right side
   9,131.13x = 386,095,481.72
5. Step 5: Solve for x
   x = 386,095,481.72/9,131.13
6. Step 6: Final answer
   x = 42,283.45