Finding the Third Proportional to 139,548 and 290,904

Step by Step Solution

1. Step 1: Write the proportion equation
   139,548 : 290,904 = 290,904 : x
2. Step 2: Convert to fraction form
   139,548/290,904 = 290,904/x
3. Step 3: Cross multiply
   139,548x = 290,904 × 290,904
4. Step 4: Simplify right side
   139,548x = 84,625,137,216
5. Step 5: Solve for x
   x = 84,625,137,216/139,548
6. Step 6: Final answer
   x = 606,423.15