Finding the Fourth Proportional to 1,243,061,403.18, 1,715,424,904.35 and 686,144,555.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,061,403.18 : 1,715,424,904.35 = 686,144,555.34 : x
2. Step 2: Convert to fraction form
   1,243,061,403.18/1,715,424,904.35 = 686,144,555.34/x
3. Step 3: Cross multiply
   1,243,061,403.18x = 1,715,424,904.35 × 686,144,555.34
4. Step 4: Simplify right side
   1,243,061,403.18x = 1,177,029,458,214,392,832
5. Step 5: Solve for x
   x = 1,177,029,458,214,392,832/1,243,061,403.18
6. Step 6: Final answer
   x = 946,879,579.08