Finding the Fourth Proportional to 271,617.72, 407,448.36 and 103,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   271,617.72 : 407,448.36 = 103,218.72 : x
2. Step 2: Convert to fraction form
   271,617.72/407,448.36 = 103,218.72/x
3. Step 3: Cross multiply
   271,617.72x = 407,448.36 × 103,218.72
4. Step 4: Simplify right side
   271,617.72x = 42,056,298,185.30
5. Step 5: Solve for x
   x = 42,056,298,185.30/271,617.72
6. Step 6: Final answer
   x = 154,836.36