Finding the Third Proportional to 90,438 and 196,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,438 : 196,444.50 = 196,444.50 : x
2. Step 2: Convert to fraction form
   90,438/196,444.50 = 196,444.50/x
3. Step 3: Cross multiply
   90,438x = 196,444.50 × 196,444.50
4. Step 4: Simplify right side
   90,438x = 38,590,441,580.25
5. Step 5: Solve for x
   x = 38,590,441,580.25/90,438
6. Step 6: Final answer
   x = 426,706.05