Finding the Fourth Proportional to 395,499.36, 545,788.88 and 214,211.23

Step by Step Solution

1. Step 1: Write the proportion equation
   395,499.36 : 545,788.88 = 214,211.23 : x
2. Step 2: Convert to fraction form
   395,499.36/545,788.88 = 214,211.23/x
3. Step 3: Cross multiply
   395,499.36x = 545,788.88 × 214,211.23
4. Step 4: Simplify right side
   395,499.36x = 116,914,109,947.89
5. Step 5: Solve for x
   x = 116,914,109,947.89/395,499.36
6. Step 6: Final answer
   x = 295,611.38