Finding the Fourth Proportional to 256,103.33, 384,155.90 and 78,610.35

Step by Step Solution

1. Step 1: Write the proportion equation
   256,103.33 : 384,155.90 = 78,610.35 : x
2. Step 2: Convert to fraction form
   256,103.33/384,155.90 = 78,610.35/x
3. Step 3: Cross multiply
   256,103.33x = 384,155.90 × 78,610.35
4. Step 4: Simplify right side
   256,103.33x = 30,198,629,753.57
5. Step 5: Solve for x
   x = 30,198,629,753.57/256,103.33
6. Step 6: Final answer
   x = 117,915.80