Finding the Fourth Proportional to 687,978.83, 949,860.43 and 446,948.34

Step by Step Solution

1. Step 1: Write the proportion equation
   687,978.83 : 949,860.43 = 446,948.34 : x
2. Step 2: Convert to fraction form
   687,978.83/949,860.43 = 446,948.34/x
3. Step 3: Cross multiply
   687,978.83x = 949,860.43 × 446,948.34
4. Step 4: Simplify right side
   687,978.83x = 424,538,542,420.19
5. Step 5: Solve for x
   x = 424,538,542,420.19/687,978.83
6. Step 6: Final answer
   x = 617,080.82