Finding the Fourth Proportional to 1,719,150.72, 2,578,723.12 and 456,978.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,719,150.72 : 2,578,723.12 = 456,978.40 : x
2. Step 2: Convert to fraction form
   1,719,150.72/2,578,723.12 = 456,978.40/x
3. Step 3: Cross multiply
   1,719,150.72x = 2,578,723.12 × 456,978.40
4. Step 4: Simplify right side
   1,719,150.72x = 1,178,420,765,420.61
5. Step 5: Solve for x
   x = 1,178,420,765,420.61/1,719,150.72
6. Step 6: Final answer
   x = 685,466.81