Finding the Fourth Proportional to 268,159.55, 402,293.33 and 78,619.55

Step by Step Solution

1. Step 1: Write the proportion equation
   268,159.55 : 402,293.33 = 78,619.55 : x
2. Step 2: Convert to fraction form
   268,159.55/402,293.33 = 78,619.55/x
3. Step 3: Cross multiply
   268,159.55x = 402,293.33 × 78,619.55
4. Step 4: Simplify right side
   268,159.55x = 31,628,120,179.50
5. Step 5: Solve for x
   x = 31,628,120,179.50/268,159.55
6. Step 6: Final answer
   x = 117,945.16