Finding the Third Proportional to 42,456.66 and 86,756.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,456.66 : 86,756.70 = 86,756.70 : x
2. Step 2: Convert to fraction form
   42,456.66/86,756.70 = 86,756.70/x
3. Step 3: Cross multiply
   42,456.66x = 86,756.70 × 86,756.70
4. Step 4: Simplify right side
   42,456.66x = 7,526,724,181.55
5. Step 5: Solve for x
   x = 7,526,724,181.55/42,456.66
6. Step 6: Final answer
   x = 177,280.19