Finding the Fourth Proportional to 260,138.51, 359,049.05 and 158,142.38

Step by Step Solution

1. Step 1: Write the proportion equation
   260,138.51 : 359,049.05 = 158,142.38 : x
2. Step 2: Convert to fraction form
   260,138.51/359,049.05 = 158,142.38/x
3. Step 3: Cross multiply
   260,138.51x = 359,049.05 × 158,142.38
4. Step 4: Simplify right side
   260,138.51x = 56,780,870,200.37
5. Step 5: Solve for x
   x = 56,780,870,200.37/260,138.51
6. Step 6: Final answer
   x = 218,271.68