Finding the Third Proportional to 78,873.31 and 171,054.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,873.31 : 171,054.56 = 171,054.56 : x
2. Step 2: Convert to fraction form
   78,873.31/171,054.56 = 171,054.56/x
3. Step 3: Cross multiply
   78,873.31x = 171,054.56 × 171,054.56
4. Step 4: Simplify right side
   78,873.31x = 29,259,663,352.07
5. Step 5: Solve for x
   x = 29,259,663,352.07/78,873.31
6. Step 6: Final answer
   x = 370,970.39