Finding the Fourth Proportional to 1,275,788,399.96, 1,760,589,178.42 and 689,077,535.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275,788,399.96 : 1,760,589,178.42 = 689,077,535.96 : x
2. Step 2: Convert to fraction form
   1,275,788,399.96/1,760,589,178.42 = 689,077,535.96/x
3. Step 3: Cross multiply
   1,275,788,399.96x = 1,760,589,178.42 × 689,077,535.96
4. Step 4: Simplify right side
   1,275,788,399.96x = 1,213,182,452,903,494,400
5. Step 5: Solve for x
   x = 1,213,182,452,903,494,400/1,275,788,399.96
6. Step 6: Final answer
   x = 950,927,640.46