Finding the Fourth Proportional to 819,405, 1,130,783.78 and 456,851.72

Step by Step Solution

1. Step 1: Write the proportion equation
   819,405 : 1,130,783.78 = 456,851.72 : x
2. Step 2: Convert to fraction form
   819,405/1,130,783.78 = 456,851.72/x
3. Step 3: Cross multiply
   819,405x = 1,130,783.78 × 456,851.72
4. Step 4: Simplify right side
   819,405x = 516,600,514,841.10
5. Step 5: Solve for x
   x = 516,600,514,841.10/819,405
6. Step 6: Final answer
   x = 630,458.09