Finding the Fourth Proportional to 978,770.40, 1,468,152.86 and 268,799.10

Step by Step Solution

1. Step 1: Write the proportion equation
   978,770.40 : 1,468,152.86 = 268,799.10 : x
2. Step 2: Convert to fraction form
   978,770.40/1,468,152.86 = 268,799.10/x
3. Step 3: Cross multiply
   978,770.40x = 1,468,152.86 × 268,799.10
4. Step 4: Simplify right side
   978,770.40x = 394,638,166,086.43
5. Step 5: Solve for x
   x = 394,638,166,086.43/978,770.40
6. Step 6: Final answer
   x = 403,197.90