Finding the Third Proportional to 116,980 and 239,491.50

Step by Step Solution

1. Step 1: Write the proportion equation
   116,980 : 239,491.50 = 239,491.50 : x
2. Step 2: Convert to fraction form
   116,980/239,491.50 = 239,491.50/x
3. Step 3: Cross multiply
   116,980x = 239,491.50 × 239,491.50
4. Step 4: Simplify right side
   116,980x = 57,356,178,572.25
5. Step 5: Solve for x
   x = 57,356,178,572.25/116,980
6. Step 6: Final answer
   x = 490,307.56