Finding the Third Proportional to 39,131.72 and 84,516.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,131.72 : 84,516.47 = 84,516.47 : x
2. Step 2: Convert to fraction form
   39,131.72/84,516.47 = 84,516.47/x
3. Step 3: Cross multiply
   39,131.72x = 84,516.47 × 84,516.47
4. Step 4: Simplify right side
   39,131.72x = 7,143,033,489.97
5. Step 5: Solve for x
   x = 7,143,033,489.97/39,131.72
6. Step 6: Final answer
   x = 182,538.20