Finding the Fourth Proportional to 1,243,061,404.68, 1,715,424,906.42 and 686,144,556.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,061,404.68 : 1,715,424,906.42 = 686,144,556.84 : x
2. Step 2: Convert to fraction form
   1,243,061,404.68/1,715,424,906.42 = 686,144,556.84/x
3. Step 3: Cross multiply
   1,243,061,404.68x = 1,715,424,906.42 × 686,144,556.84
4. Step 4: Simplify right side
   1,243,061,404.68x = 1,177,029,462,207,849,472
5. Step 5: Solve for x
   x = 1,177,029,462,207,849,472/1,243,061,404.68
6. Step 6: Final answer
   x = 946,879,581.15