Finding the Third Proportional to 90,972.56 and 197,407.69

Step by Step Solution

1. Step 1: Write the proportion equation
   90,972.56 : 197,407.69 = 197,407.69 : x
2. Step 2: Convert to fraction form
   90,972.56/197,407.69 = 197,407.69/x
3. Step 3: Cross multiply
   90,972.56x = 197,407.69 × 197,407.69
4. Step 4: Simplify right side
   90,972.56x = 38,969,795,084.10
5. Step 5: Solve for x
   x = 38,969,795,084.10/90,972.56
6. Step 6: Final answer
   x = 428,368.66