Finding the Third Proportional to 90,422.86 and 196,412.91

Step by Step Solution

1. Step 1: Write the proportion equation
   90,422.86 : 196,412.91 = 196,412.91 : x
2. Step 2: Convert to fraction form
   90,422.86/196,412.91 = 196,412.91/x
3. Step 3: Cross multiply
   90,422.86x = 196,412.91 × 196,412.91
4. Step 4: Simplify right side
   90,422.86x = 38,578,029,741.57
5. Step 5: Solve for x
   x = 38,578,029,741.57/90,422.86
6. Step 6: Final answer
   x = 426,640.23