Finding the Third Proportional to 278,698.50 and 602,109

Step by Step Solution

1. Step 1: Write the proportion equation
   278,698.50 : 602,109 = 602,109 : x
2. Step 2: Convert to fraction form
   278,698.50/602,109 = 602,109/x
3. Step 3: Cross multiply
   278,698.50x = 602,109 × 602,109
4. Step 4: Simplify right side
   278,698.50x = 362,535,247,881
5. Step 5: Solve for x
   x = 362,535,247,881/278,698.50
6. Step 6: Final answer
   x = 1,300,815.21