Finding the Third Proportional to 258,516 and 372,343.50

Step by Step Solution

1. Step 1: Write the proportion equation
   258,516 : 372,343.50 = 372,343.50 : x
2. Step 2: Convert to fraction form
   258,516/372,343.50 = 372,343.50/x
3. Step 3: Cross multiply
   258,516x = 372,343.50 × 372,343.50
4. Step 4: Simplify right side
   258,516x = 138,639,681,992.25
5. Step 5: Solve for x
   x = 138,639,681,992.25/258,516
6. Step 6: Final answer
   x = 536,290.53