Finding the Fourth Proportional to 325,753.81, 448,978.72 and 216,662.91

Step by Step Solution

1. Step 1: Write the proportion equation
   325,753.81 : 448,978.72 = 216,662.91 : x
2. Step 2: Convert to fraction form
   325,753.81/448,978.72 = 216,662.91/x
3. Step 3: Cross multiply
   325,753.81x = 448,978.72 × 216,662.91
4. Step 4: Simplify right side
   325,753.81x = 97,277,036,003.28
5. Step 5: Solve for x
   x = 97,277,036,003.28/325,753.81
6. Step 6: Final answer
   x = 298,621.33