Finding the Third Proportional to 42,251.63 and 85,672.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,251.63 : 85,672.69 = 85,672.69 : x
2. Step 2: Convert to fraction form
   42,251.63/85,672.69 = 85,672.69/x
3. Step 3: Cross multiply
   42,251.63x = 85,672.69 × 85,672.69
4. Step 4: Simplify right side
   42,251.63x = 7,339,809,383.47
5. Step 5: Solve for x
   x = 7,339,809,383.47/42,251.63
6. Step 6: Final answer
   x = 173,716.62