Finding the Fourth Proportional to 395,144.82, 545,300.51 and 213,856.94

Step by Step Solution

1. Step 1: Write the proportion equation
   395,144.82 : 545,300.51 = 213,856.94 : x
2. Step 2: Convert to fraction form
   395,144.82/545,300.51 = 213,856.94/x
3. Step 3: Cross multiply
   395,144.82x = 545,300.51 × 213,856.94
4. Step 4: Simplify right side
   395,144.82x = 116,616,298,449.04
5. Step 5: Solve for x
   x = 116,616,298,449.04/395,144.82
6. Step 6: Final answer
   x = 295,122.93