Finding the Fourth Proportional to 1,087,431.69, 1,501,201.17 and 679,760.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087,431.69 : 1,501,201.17 = 679,760.31 : x
2. Step 2: Convert to fraction form
   1,087,431.69/1,501,201.17 = 679,760.31/x
3. Step 3: Cross multiply
   1,087,431.69x = 1,501,201.17 × 679,760.31
4. Step 4: Simplify right side
   1,087,431.69x = 1,020,456,972,691.56
5. Step 5: Solve for x
   x = 1,020,456,972,691.56/1,087,431.69
6. Step 6: Final answer
   x = 938,410.18