Finding the Third Proportional to 90,422.58 and 196,412.34

Step by Step Solution

1. Step 1: Write the proportion equation
   90,422.58 : 196,412.34 = 196,412.34 : x
2. Step 2: Convert to fraction form
   90,422.58/196,412.34 = 196,412.34/x
3. Step 3: Cross multiply
   90,422.58x = 196,412.34 × 196,412.34
4. Step 4: Simplify right side
   90,422.58x = 38,577,808,777.37
5. Step 5: Solve for x
   x = 38,577,808,777.37/90,422.58
6. Step 6: Final answer
   x = 426,639.12