Finding the Third Proportional to 55,490 and 122,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   55,490 : 122,290.50 = 122,290.50 : x
2. Step 2: Convert to fraction form
   55,490/122,290.50 = 122,290.50/x
3. Step 3: Cross multiply
   55,490x = 122,290.50 × 122,290.50
4. Step 4: Simplify right side
   55,490x = 14,954,966,390.25
5. Step 5: Solve for x
   x = 14,954,966,390.25/55,490
6. Step 6: Final answer
   x = 269,507.41