Finding the Fourth Proportional to 276,005.49, 380,889.68 and 153,499.58

Step by Step Solution

1. Step 1: Write the proportion equation
   276,005.49 : 380,889.68 = 153,499.58 : x
2. Step 2: Convert to fraction form
   276,005.49/380,889.68 = 153,499.58/x
3. Step 3: Cross multiply
   276,005.49x = 380,889.68 × 153,499.58
4. Step 4: Simplify right side
   276,005.49x = 58,466,404,662.72
5. Step 5: Solve for x
   x = 58,466,404,662.72/276,005.49
6. Step 6: Final answer
   x = 211,830.59