Finding the Fourth Proportional to 939,978.14, 1,297,171.49 and 510,258.56

Step by Step Solution

1. Step 1: Write the proportion equation
   939,978.14 : 1,297,171.49 = 510,258.56 : x
2. Step 2: Convert to fraction form
   939,978.14/1,297,171.49 = 510,258.56/x
3. Step 3: Cross multiply
   939,978.14x = 1,297,171.49 × 510,258.56
4. Step 4: Simplify right side
   939,978.14x = 661,892,856,560.45
5. Step 5: Solve for x
   x = 661,892,856,560.45/939,978.14
6. Step 6: Final answer
   x = 704,157.71