Finding the Fourth Proportional to 227,978.30, 341,974.39 and 78,216.49

Step by Step Solution

1. Step 1: Write the proportion equation
   227,978.30 : 341,974.39 = 78,216.49 : x
2. Step 2: Convert to fraction form
   227,978.30/341,974.39 = 78,216.49/x
3. Step 3: Cross multiply
   227,978.30x = 341,974.39 × 78,216.49
4. Step 4: Simplify right side
   227,978.30x = 26,748,034,910.67
5. Step 5: Solve for x
   x = 26,748,034,910.67/227,978.30
6. Step 6: Final answer
   x = 117,327.11