Finding the Third Proportional to 210,661.59 and 298,079.72

Step by Step Solution

1. Step 1: Write the proportion equation
   210,661.59 : 298,079.72 = 298,079.72 : x
2. Step 2: Convert to fraction form
   210,661.59/298,079.72 = 298,079.72/x
3. Step 3: Cross multiply
   210,661.59x = 298,079.72 × 298,079.72
4. Step 4: Simplify right side
   210,661.59x = 88,851,518,730.08
5. Step 5: Solve for x
   x = 88,851,518,730.08/210,661.59
6. Step 6: Final answer
   x = 421,773.69