Finding the Fourth Proportional to 1,386,579.33, 1,913,303.59 and 813,410.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386,579.33 : 1,913,303.59 = 813,410.37 : x
2. Step 2: Convert to fraction form
   1,386,579.33/1,913,303.59 = 813,410.37/x
3. Step 3: Cross multiply
   1,386,579.33x = 1,913,303.59 × 813,410.37
4. Step 4: Simplify right side
   1,386,579.33x = 1,556,300,981,064.23
5. Step 5: Solve for x
   x = 1,556,300,981,064.23/1,386,579.33
6. Step 6: Final answer
   x = 1,122,403.13