Finding the Third Proportional to 245,049 and 390,181.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,049 : 390,181.50 = 390,181.50 : x
2. Step 2: Convert to fraction form
   245,049/390,181.50 = 390,181.50/x
3. Step 3: Cross multiply
   245,049x = 390,181.50 × 390,181.50
4. Step 4: Simplify right side
   245,049x = 152,241,602,942.25
5. Step 5: Solve for x
   x = 152,241,602,942.25/245,049
6. Step 6: Final answer
   x = 621,270.04