Finding the Third Proportional to 9,157,123,620 and 19,835,509,860

Step by Step Solution

1. Step 1: Write the proportion equation
   9,157,123,620 : 19,835,509,860 = 19,835,509,860 : x
2. Step 2: Convert to fraction form
   9,157,123,620/19,835,509,860 = 19,835,509,860/x
3. Step 3: Cross multiply
   9,157,123,620x = 19,835,509,860 × 19,835,509,860
4. Step 4: Simplify right side
   9,157,123,620x = 393,447,451,406,157,217,792
5. Step 5: Solve for x
   x = 393,447,451,406,157,217,792/9,157,123,620
6. Step 6: Final answer
   x = 42,966,270,603.45