Finding the Third Proportional to 108,987.75 and 243,490.50

Step by Step Solution

1. Step 1: Write the proportion equation
   108,987.75 : 243,490.50 = 243,490.50 : x
2. Step 2: Convert to fraction form
   108,987.75/243,490.50 = 243,490.50/x
3. Step 3: Cross multiply
   108,987.75x = 243,490.50 × 243,490.50
4. Step 4: Simplify right side
   108,987.75x = 59,287,623,590.25
5. Step 5: Solve for x
   x = 59,287,623,590.25/108,987.75
6. Step 6: Final answer
   x = 543,984.29