Finding the Fourth Proportional to 227,978.25, 341,974.35 and 78,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   227,978.25 : 341,974.35 = 78,216.45 : x
2. Step 2: Convert to fraction form
   227,978.25/341,974.35 = 78,216.45/x
3. Step 3: Cross multiply
   227,978.25x = 341,974.35 × 78,216.45
4. Step 4: Simplify right side
   227,978.25x = 26,748,019,648.06
5. Step 5: Solve for x
   x = 26,748,019,648.06/227,978.25
6. Step 6: Final answer
   x = 117,327.07