Finding the Fourth Proportional to 276,112.89, 381,025.89 and 155,261.16

Step by Step Solution

1. Step 1: Write the proportion equation
   276,112.89 : 381,025.89 = 155,261.16 : x
2. Step 2: Convert to fraction form
   276,112.89/381,025.89 = 155,261.16/x
3. Step 3: Cross multiply
   276,112.89x = 381,025.89 × 155,261.16
4. Step 4: Simplify right side
   276,112.89x = 59,158,521,671.43
5. Step 5: Solve for x
   x = 59,158,521,671.43/276,112.89
6. Step 6: Final answer
   x = 214,254.83