Finding the Fourth Proportional to 915,454.46, 1,263,401.61 and 507,596.78

Step by Step Solution

1. Step 1: Write the proportion equation
   915,454.46 : 1,263,401.61 = 507,596.78 : x
2. Step 2: Convert to fraction form
   915,454.46/1,263,401.61 = 507,596.78/x
3. Step 3: Cross multiply
   915,454.46x = 1,263,401.61 × 507,596.78
4. Step 4: Simplify right side
   915,454.46x = 641,298,589,082.82
5. Step 5: Solve for x
   x = 641,298,589,082.82/915,454.46
6. Step 6: Final answer
   x = 700,524.84