Finding the Third Proportional to 191,018.25 and 258,499.69

Step by Step Solution

1. Step 1: Write the proportion equation
   191,018.25 : 258,499.69 = 258,499.69 : x
2. Step 2: Convert to fraction form
   191,018.25/258,499.69 = 258,499.69/x
3. Step 3: Cross multiply
   191,018.25x = 258,499.69 × 258,499.69
4. Step 4: Simplify right side
   191,018.25x = 66,822,088,437.60
5. Step 5: Solve for x
   x = 66,822,088,437.60/191,018.25
6. Step 6: Final answer
   x = 349,820.44