Finding the Fourth Proportional to 276,196.56, 381,203.61 and 172,878.69

Step by Step Solution

1. Step 1: Write the proportion equation
   276,196.56 : 381,203.61 = 172,878.69 : x
2. Step 2: Convert to fraction form
   276,196.56/381,203.61 = 172,878.69/x
3. Step 3: Cross multiply
   276,196.56x = 381,203.61 × 172,878.69
4. Step 4: Simplify right side
   276,196.56x = 65,901,980,720.07
5. Step 5: Solve for x
   x = 65,901,980,720.07/276,196.56
6. Step 6: Final answer
   x = 238,605.36