Finding the Third Proportional to 138,299.50 and 281,672

Step by Step Solution

1. Step 1: Write the proportion equation
   138,299.50 : 281,672 = 281,672 : x
2. Step 2: Convert to fraction form
   138,299.50/281,672 = 281,672/x
3. Step 3: Cross multiply
   138,299.50x = 281,672 × 281,672
4. Step 4: Simplify right side
   138,299.50x = 79,339,115,584
5. Step 5: Solve for x
   x = 79,339,115,584/138,299.50
6. Step 6: Final answer
   x = 573,676.08