Finding the Fourth Proportional to 227,981.30, 341,978.90 and 78,219.50

Step by Step Solution

1. Step 1: Write the proportion equation
   227,981.30 : 341,978.90 = 78,219.50 : x
2. Step 2: Convert to fraction form
   227,981.30/341,978.90 = 78,219.50/x
3. Step 3: Cross multiply
   227,981.30x = 341,978.90 × 78,219.50
4. Step 4: Simplify right side
   227,981.30x = 26,749,418,568.55
5. Step 5: Solve for x
   x = 26,749,418,568.55/227,981.30
6. Step 6: Final answer
   x = 117,331.63