Finding the Third Proportional to 138,460 and 300,248

Step by Step Solution

1. Step 1: Write the proportion equation
   138,460 : 300,248 = 300,248 : x
2. Step 2: Convert to fraction form
   138,460/300,248 = 300,248/x
3. Step 3: Cross multiply
   138,460x = 300,248 × 300,248
4. Step 4: Simplify right side
   138,460x = 90,148,861,504
5. Step 5: Solve for x
   x = 90,148,861,504/138,460
6. Step 6: Final answer
   x = 651,082.35