Finding the Fourth Proportional to 373,978.56, 561,171.96 and 216,514.56

Step by Step Solution

1. Step 1: Write the proportion equation
   373,978.56 : 561,171.96 = 216,514.56 : x
2. Step 2: Convert to fraction form
   373,978.56/561,171.96 = 216,514.56/x
3. Step 3: Cross multiply
   373,978.56x = 561,171.96 × 216,514.56
4. Step 4: Simplify right side
   373,978.56x = 121,501,900,003.74
5. Step 5: Solve for x
   x = 121,501,900,003.74/373,978.56
6. Step 6: Final answer
   x = 324,890.02