Finding the Third Proportional to 40,606.31 and 87,211.69

Step by Step Solution

1. Step 1: Write the proportion equation
   40,606.31 : 87,211.69 = 87,211.69 : x
2. Step 2: Convert to fraction form
   40,606.31/87,211.69 = 87,211.69/x
3. Step 3: Cross multiply
   40,606.31x = 87,211.69 × 87,211.69
4. Step 4: Simplify right side
   40,606.31x = 7,605,878,436.60
5. Step 5: Solve for x
   x = 7,605,878,436.60/40,606.31
6. Step 6: Final answer
   x = 187,307.78