Finding the Third Proportional to 42,246.56 and 85,658.63

Step by Step Solution

1. Step 1: Write the proportion equation
   42,246.56 : 85,658.63 = 85,658.63 : x
2. Step 2: Convert to fraction form
   42,246.56/85,658.63 = 85,658.63/x
3. Step 3: Cross multiply
   42,246.56x = 85,658.63 × 85,658.63
4. Step 4: Simplify right side
   42,246.56x = 7,337,400,036.89
5. Step 5: Solve for x
   x = 7,337,400,036.89/42,246.56
6. Step 6: Final answer
   x = 173,680.40