Finding the Third Proportional to 90,424.27 and 196,415.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,424.27 : 196,415.72 = 196,415.72 : x
2. Step 2: Convert to fraction form
   90,424.27/196,415.72 = 196,415.72/x
3. Step 3: Cross multiply
   90,424.27x = 196,415.72 × 196,415.72
4. Step 4: Simplify right side
   90,424.27x = 38,579,134,572.08
5. Step 5: Solve for x
   x = 38,579,134,572.08/90,424.27
6. Step 6: Final answer
   x = 426,645.82