Finding the Fourth Proportional to 279,878.69, 385,927.34 and 189,076.98

Step by Step Solution

1. Step 1: Write the proportion equation
   279,878.69 : 385,927.34 = 189,076.98 : x
2. Step 2: Convert to fraction form
   279,878.69/385,927.34 = 189,076.98/x
3. Step 3: Cross multiply
   279,878.69x = 385,927.34 × 189,076.98
4. Step 4: Simplify right side
   279,878.69x = 72,969,976,448.48
5. Step 5: Solve for x
   x = 72,969,976,448.48/279,878.69
6. Step 6: Final answer
   x = 260,720.01