Finding the Fourth Proportional to 276,788.72, 381,889.41 and 155,887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   276,788.72 : 381,889.41 = 155,887.72 : x
2. Step 2: Convert to fraction form
   276,788.72/381,889.41 = 155,887.72/x
3. Step 3: Cross multiply
   276,788.72x = 381,889.41 × 155,887.72
4. Step 4: Simplify right side
   276,788.72x = 59,531,869,417.05
5. Step 5: Solve for x
   x = 59,531,869,417.05/276,788.72
6. Step 6: Final answer
   x = 215,080.55