Finding the Third Proportional to 39,684.94 and 84,905.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,684.94 : 84,905.72 = 84,905.72 : x
2. Step 2: Convert to fraction form
   39,684.94/84,905.72 = 84,905.72/x
3. Step 3: Cross multiply
   39,684.94x = 84,905.72 × 84,905.72
4. Step 4: Simplify right side
   39,684.94x = 7,208,981,076.45
5. Step 5: Solve for x
   x = 7,208,981,076.45/39,684.94
6. Step 6: Final answer
   x = 181,655.35