Finding the Fourth Proportional to 492,890.45, 739,017.72 and 193,401.29

Step by Step Solution

1. Step 1: Write the proportion equation
   492,890.45 : 739,017.72 = 193,401.29 : x
2. Step 2: Convert to fraction form
   492,890.45/739,017.72 = 193,401.29/x
3. Step 3: Cross multiply
   492,890.45x = 739,017.72 × 193,401.29
4. Step 4: Simplify right side
   492,890.45x = 142,926,980,380.86
5. Step 5: Solve for x
   x = 142,926,980,380.86/492,890.45
6. Step 6: Final answer
   x = 289,977.18