Finding the Fourth Proportional to 1,019,429.47, 1,407,026.73 and 646,651.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019,429.47 : 1,407,026.73 = 646,651.28 : x
2. Step 2: Convert to fraction form
   1,019,429.47/1,407,026.73 = 646,651.28/x
3. Step 3: Cross multiply
   1,019,429.47x = 1,407,026.73 × 646,651.28
4. Step 4: Simplify right side
   1,019,429.47x = 909,855,625,680.33
5. Step 5: Solve for x
   x = 909,855,625,680.33/1,019,429.47
6. Step 6: Final answer
   x = 892,514.54