Finding the Third Proportional to 4,578,515,061 and 9,917,656,086

Step by Step Solution

1. Step 1: Write the proportion equation
   4,578,515,061 : 9,917,656,086 = 9,917,656,086 : x
2. Step 2: Convert to fraction form
   4,578,515,061/9,917,656,086 = 9,917,656,086/x
3. Step 3: Cross multiply
   4,578,515,061x = 9,917,656,086 × 9,917,656,086
4. Step 4: Simplify right side
   4,578,515,061x = 98,359,902,240,172,834,816
5. Step 5: Solve for x
   x = 98,359,902,240,172,834,816/4,578,515,061
6. Step 6: Final answer
   x = 21,482,926,435.69