Finding the Fourth Proportional to 321,131.77, 443,129.52 and 177,865.05

Step by Step Solution

1. Step 1: Write the proportion equation
   321,131.77 : 443,129.52 = 177,865.05 : x
2. Step 2: Convert to fraction form
   321,131.77/443,129.52 = 177,865.05/x
3. Step 3: Cross multiply
   321,131.77x = 443,129.52 × 177,865.05
4. Step 4: Simplify right side
   321,131.77x = 78,817,254,231.28
5. Step 5: Solve for x
   x = 78,817,254,231.28/321,131.77
6. Step 6: Final answer
   x = 245,435.87