Finding the Third Proportional to 87,619.50 and 123,980.25

Step by Step Solution

1. Step 1: Write the proportion equation
   87,619.50 : 123,980.25 = 123,980.25 : x
2. Step 2: Convert to fraction form
   87,619.50/123,980.25 = 123,980.25/x
3. Step 3: Cross multiply
   87,619.50x = 123,980.25 × 123,980.25
4. Step 4: Simplify right side
   87,619.50x = 15,371,102,390.06
5. Step 5: Solve for x
   x = 15,371,102,390.06/87,619.50
6. Step 6: Final answer
   x = 175,430.15