Finding the Third Proportional to 9,131.91 and 19,938.66

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.91 : 19,938.66 = 19,938.66 : x
2. Step 2: Convert to fraction form
   9,131.91/19,938.66 = 19,938.66/x
3. Step 3: Cross multiply
   9,131.91x = 19,938.66 × 19,938.66
4. Step 4: Simplify right side
   9,131.91x = 397,550,013.06
5. Step 5: Solve for x
   x = 397,550,013.06/9,131.91
6. Step 6: Final answer
   x = 43,534.18