Finding the Third Proportional to 38,640.94 and 81,432.56

Step by Step Solution

1. Step 1: Write the proportion equation
   38,640.94 : 81,432.56 = 81,432.56 : x
2. Step 2: Convert to fraction form
   38,640.94/81,432.56 = 81,432.56/x
3. Step 3: Cross multiply
   38,640.94x = 81,432.56 × 81,432.56
4. Step 4: Simplify right side
   38,640.94x = 6,631,262,235.32
5. Step 5: Solve for x
   x = 6,631,262,235.32/38,640.94
6. Step 6: Final answer
   x = 171,612.35