Finding the Third Proportional to 138,298.50 and 281,670

Step by Step Solution

1. Step 1: Write the proportion equation
   138,298.50 : 281,670 = 281,670 : x
2. Step 2: Convert to fraction form
   138,298.50/281,670 = 281,670/x
3. Step 3: Cross multiply
   138,298.50x = 281,670 × 281,670
4. Step 4: Simplify right side
   138,298.50x = 79,337,988,900
5. Step 5: Solve for x
   x = 79,337,988,900/138,298.50
6. Step 6: Final answer
   x = 573,672.09