Finding the Third Proportional to 53,340 and 123,488

Step by Step Solution

1. Step 1: Write the proportion equation
   53,340 : 123,488 = 123,488 : x
2. Step 2: Convert to fraction form
   53,340/123,488 = 123,488/x
3. Step 3: Cross multiply
   53,340x = 123,488 × 123,488
4. Step 4: Simplify right side
   53,340x = 15,249,286,144
5. Step 5: Solve for x
   x = 15,249,286,144/53,340
6. Step 6: Final answer
   x = 285,888.38