Finding the Fourth Proportional to 281,353.55, 388,277.69 and 154,030.05

Step by Step Solution

1. Step 1: Write the proportion equation
   281,353.55 : 388,277.69 = 154,030.05 : x
2. Step 2: Convert to fraction form
   281,353.55/388,277.69 = 154,030.05/x
3. Step 3: Cross multiply
   281,353.55x = 388,277.69 × 154,030.05
4. Step 4: Simplify right side
   281,353.55x = 59,806,431,234.43
5. Step 5: Solve for x
   x = 59,806,431,234.43/281,353.55
6. Step 6: Final answer
   x = 212,566.83