Finding the Fourth Proportional to 268,145.05, 402,271.58 and 78,605.05

Step by Step Solution

1. Step 1: Write the proportion equation
   268,145.05 : 402,271.58 = 78,605.05 : x
2. Step 2: Convert to fraction form
   268,145.05/402,271.58 = 78,605.05/x
3. Step 3: Cross multiply
   268,145.05x = 402,271.58 × 78,605.05
4. Step 4: Simplify right side
   268,145.05x = 31,620,577,266.45
5. Step 5: Solve for x
   x = 31,620,577,266.45/268,145.05
6. Step 6: Final answer
   x = 117,923.40