Finding the Third Proportional to 258,197 and 391,159.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,197 : 391,159.50 = 391,159.50 : x
2. Step 2: Convert to fraction form
   258,197/391,159.50 = 391,159.50/x
3. Step 3: Cross multiply
   258,197x = 391,159.50 × 391,159.50
4. Step 4: Simplify right side
   258,197x = 153,005,754,440.25
5. Step 5: Solve for x
   x = 153,005,754,440.25/258,197
6. Step 6: Final answer
   x = 592,593.08