Finding the Fourth Proportional to 687,144.02, 1,030,715.34 and 470,789.57

Step by Step Solution

1. Step 1: Write the proportion equation
   687,144.02 : 1,030,715.34 = 470,789.57 : x
2. Step 2: Convert to fraction form
   687,144.02/1,030,715.34 = 470,789.57/x
3. Step 3: Cross multiply
   687,144.02x = 1,030,715.34 × 470,789.57
4. Step 4: Simplify right side
   687,144.02x = 485,250,026,557.43
5. Step 5: Solve for x
   x = 485,250,026,557.43/687,144.02
6. Step 6: Final answer
   x = 706,183.88