Finding the Third Proportional to 136,300.50 and 279,403.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,300.50 : 279,403.50 = 279,403.50 : x
2. Step 2: Convert to fraction form
   136,300.50/279,403.50 = 279,403.50/x
3. Step 3: Cross multiply
   136,300.50x = 279,403.50 × 279,403.50
4. Step 4: Simplify right side
   136,300.50x = 78,066,315,812.25
5. Step 5: Solve for x
   x = 78,066,315,812.25/136,300.50
6. Step 6: Final answer
   x = 572,751.50