Finding the Fourth Proportional to 261,581.82, 360,994.78 and 154,156.38

Step by Step Solution

1. Step 1: Write the proportion equation
   261,581.82 : 360,994.78 = 154,156.38 : x
2. Step 2: Convert to fraction form
   261,581.82/360,994.78 = 154,156.38/x
3. Step 3: Cross multiply
   261,581.82x = 360,994.78 × 154,156.38
4. Step 4: Simplify right side
   261,581.82x = 55,649,648,483.70
5. Step 5: Solve for x
   x = 55,649,648,483.70/261,581.82
6. Step 6: Final answer
   x = 212,742.80