Finding the Fourth Proportional to 686,522.10, 1,027,709.55 and 603,578.10

Step by Step Solution

1. Step 1: Write the proportion equation
   686,522.10 : 1,027,709.55 = 603,578.10 : x
2. Step 2: Convert to fraction form
   686,522.10/1,027,709.55 = 603,578.10/x
3. Step 3: Cross multiply
   686,522.10x = 1,027,709.55 × 603,578.10
4. Step 4: Simplify right side
   686,522.10x = 620,302,977,540.86
5. Step 5: Solve for x
   x = 620,302,977,540.86/686,522.10
6. Step 6: Final answer
   x = 903,544.08