Finding the Fourth Proportional to 644,115.72, 965,123.72 and 510,271.32

Step by Step Solution

1. Step 1: Write the proportion equation
   644,115.72 : 965,123.72 = 510,271.32 : x
2. Step 2: Convert to fraction form
   644,115.72/965,123.72 = 510,271.32/x
3. Step 3: Cross multiply
   644,115.72x = 965,123.72 × 510,271.32
4. Step 4: Simplify right side
   644,115.72x = 492,474,954,567.71
5. Step 5: Solve for x
   x = 492,474,954,567.71/644,115.72
6. Step 6: Final answer
   x = 764,575.28