Finding the Third Proportional to 90,478.27 and 178,685.79

Step by Step Solution

1. Step 1: Write the proportion equation
   90,478.27 : 178,685.79 = 178,685.79 : x
2. Step 2: Convert to fraction form
   90,478.27/178,685.79 = 178,685.79/x
3. Step 3: Cross multiply
   90,478.27x = 178,685.79 × 178,685.79
4. Step 4: Simplify right side
   90,478.27x = 31,928,611,212.89
5. Step 5: Solve for x
   x = 31,928,611,212.89/90,478.27
6. Step 6: Final answer
   x = 352,887.08