Finding the Third Proportional to 90,422.58 and 196,913.53

Step by Step Solution

1. Step 1: Write the proportion equation
   90,422.58 : 196,913.53 = 196,913.53 : x
2. Step 2: Convert to fraction form
   90,422.58/196,913.53 = 196,913.53/x
3. Step 3: Cross multiply
   90,422.58x = 196,913.53 × 196,913.53
4. Step 4: Simplify right side
   90,422.58x = 38,774,938,789.34
5. Step 5: Solve for x
   x = 38,774,938,789.34/90,422.58
6. Step 6: Final answer
   x = 428,819.21