Finding the Third Proportional to 139,560 and 290,928

Step by Step Solution

1. Step 1: Write the proportion equation
   139,560 : 290,928 = 290,928 : x
2. Step 2: Convert to fraction form
   139,560/290,928 = 290,928/x
3. Step 3: Cross multiply
   139,560x = 290,928 × 290,928
4. Step 4: Simplify right side
   139,560x = 84,639,101,184
5. Step 5: Solve for x
   x = 84,639,101,184/139,560
6. Step 6: Final answer
   x = 606,471.06