Finding the Third Proportional to 138,072 and 297,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   138,072 : 297,271.50 = 297,271.50 : x
2. Step 2: Convert to fraction form
   138,072/297,271.50 = 297,271.50/x
3. Step 3: Cross multiply
   138,072x = 297,271.50 × 297,271.50
4. Step 4: Simplify right side
   138,072x = 88,370,344,712.25
5. Step 5: Solve for x
   x = 88,370,344,712.25/138,072
6. Step 6: Final answer
   x = 640,030.89