Finding the Fourth Proportional to 200,359.78, 276,496.49 and 109,721.28

Step by Step Solution

1. Step 1: Write the proportion equation
   200,359.78 : 276,496.49 = 109,721.28 : x
2. Step 2: Convert to fraction form
   200,359.78/276,496.49 = 109,721.28/x
3. Step 3: Cross multiply
   200,359.78x = 276,496.49 × 109,721.28
4. Step 4: Simplify right side
   200,359.78x = 30,337,549,492.29
5. Step 5: Solve for x
   x = 30,337,549,492.29/200,359.78
6. Step 6: Final answer
   x = 151,415.37