Finding the Third Proportional to 90,302,978 and 197,858,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,302,978 : 197,858,105.50 = 197,858,105.50 : x
2. Step 2: Convert to fraction form
   90,302,978/197,858,105.50 = 197,858,105.50/x
3. Step 3: Cross multiply
   90,302,978x = 197,858,105.50 × 197,858,105.50
4. Step 4: Simplify right side
   90,302,978x = 39,147,829,912,049,128
5. Step 5: Solve for x
   x = 39,147,829,912,049,128/90,302,978
6. Step 6: Final answer
   x = 433,516,488.37