Finding the Fourth Proportional to 276,789.72, 381,890.79 and 155,888.72

Step by Step Solution

1. Step 1: Write the proportion equation
   276,789.72 : 381,890.79 = 155,888.72 : x
2. Step 2: Convert to fraction form
   276,789.72/381,890.79 = 155,888.72/x
3. Step 3: Cross multiply
   276,789.72x = 381,890.79 × 155,888.72
4. Step 4: Simplify right side
   276,789.72x = 59,532,466,432.89
5. Step 5: Solve for x
   x = 59,532,466,432.89/276,789.72
6. Step 6: Final answer
   x = 215,081.93