Finding the Third Proportional to 91,620.25 and 197,091.50

Step by Step Solution

1. Step 1: Write the proportion equation
   91,620.25 : 197,091.50 = 197,091.50 : x
2. Step 2: Convert to fraction form
   91,620.25/197,091.50 = 197,091.50/x
3. Step 3: Cross multiply
   91,620.25x = 197,091.50 × 197,091.50
4. Step 4: Simplify right side
   91,620.25x = 38,845,059,372.25
5. Step 5: Solve for x
   x = 38,845,059,372.25/91,620.25
6. Step 6: Final answer
   x = 423,978.97