Finding the Third Proportional to 39,576.38 and 86,657.63

Step by Step Solution

1. Step 1: Write the proportion equation
   39,576.38 : 86,657.63 = 86,657.63 : x
2. Step 2: Convert to fraction form
   39,576.38/86,657.63 = 86,657.63/x
3. Step 3: Cross multiply
   39,576.38x = 86,657.63 × 86,657.63
4. Step 4: Simplify right side
   39,576.38x = 7,509,543,970.64
5. Step 5: Solve for x
   x = 7,509,543,970.64/39,576.38
6. Step 6: Final answer
   x = 189,748.15