Finding the Fourth Proportional to 281,469.42, 388,428.39 and 152,409.30

Step by Step Solution

1. Step 1: Write the proportion equation
   281,469.42 : 388,428.39 = 152,409.30 : x
2. Step 2: Convert to fraction form
   281,469.42/388,428.39 = 152,409.30/x
3. Step 3: Cross multiply
   281,469.42x = 388,428.39 × 152,409.30
4. Step 4: Simplify right side
   281,469.42x = 59,200,099,020.03
5. Step 5: Solve for x
   x = 59,200,099,020.03/281,469.42
6. Step 6: Final answer
   x = 210,325.15