Finding the Fourth Proportional to 116,456.28, 160,770.78 and 78,415.80

Step by Step Solution

1. Step 1: Write the proportion equation
   116,456.28 : 160,770.78 = 78,415.80 : x
2. Step 2: Convert to fraction form
   116,456.28/160,770.78 = 78,415.80/x
3. Step 3: Cross multiply
   116,456.28x = 160,770.78 × 78,415.80
4. Step 4: Simplify right side
   116,456.28x = 12,606,969,330.32
5. Step 5: Solve for x
   x = 12,606,969,330.32/116,456.28
6. Step 6: Final answer
   x = 108,254.95