Finding the Fourth Proportional to 279,478.89, 385,556.27 and 188,805.69

Step by Step Solution

1. Step 1: Write the proportion equation
   279,478.89 : 385,556.27 = 188,805.69 : x
2. Step 2: Convert to fraction form
   279,478.89/385,556.27 = 188,805.69/x
3. Step 3: Cross multiply
   279,478.89x = 385,556.27 × 188,805.69
4. Step 4: Simplify right side
   279,478.89x = 72,795,216,647.15
5. Step 5: Solve for x
   x = 72,795,216,647.15/279,478.89
6. Step 6: Final answer
   x = 260,467.67