Finding the Third Proportional to 153,915 and 245,884.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,915 : 245,884.50 = 245,884.50 : x
2. Step 2: Convert to fraction form
   153,915/245,884.50 = 245,884.50/x
3. Step 3: Cross multiply
   153,915x = 245,884.50 × 245,884.50
4. Step 4: Simplify right side
   153,915x = 60,459,187,340.25
5. Step 5: Solve for x
   x = 60,459,187,340.25/153,915
6. Step 6: Final answer
   x = 392,808.94