Finding the Third Proportional to 170,494.88 and 258,111.56

Step by Step Solution

1. Step 1: Write the proportion equation
   170,494.88 : 258,111.56 = 258,111.56 : x
2. Step 2: Convert to fraction form
   170,494.88/258,111.56 = 258,111.56/x
3. Step 3: Cross multiply
   170,494.88x = 258,111.56 × 258,111.56
4. Step 4: Simplify right side
   170,494.88x = 66,621,578,696.19
5. Step 5: Solve for x
   x = 66,621,578,696.19/170,494.88
6. Step 6: Final answer
   x = 390,754.14