Finding the Fourth Proportional to 355,455, 490,527.78 and 194,310.72

Step by Step Solution

1. Step 1: Write the proportion equation
   355,455 : 490,527.78 = 194,310.72 : x
2. Step 2: Convert to fraction form
   355,455/490,527.78 = 194,310.72/x
3. Step 3: Cross multiply
   355,455x = 490,527.78 × 194,310.72
4. Step 4: Simplify right side
   355,455x = 95,314,806,111.80
5. Step 5: Solve for x
   x = 95,314,806,111.80/355,455
6. Step 6: Final answer
   x = 268,148.73