Finding the Third Proportional to 129,301.31 and 207,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   129,301.31 : 207,620.72 = 207,620.72 : x
2. Step 2: Convert to fraction form
   129,301.31/207,620.72 = 207,620.72/x
3. Step 3: Cross multiply
   129,301.31x = 207,620.72 × 207,620.72
4. Step 4: Simplify right side
   129,301.31x = 43,106,362,854.27
5. Step 5: Solve for x
   x = 43,106,362,854.27/129,301.31
6. Step 6: Final answer
   x = 333,379.16