Finding the Fourth Proportional to 400,131.77, 552,174.03 and 218,843.10

Step by Step Solution

1. Step 1: Write the proportion equation
   400,131.77 : 552,174.03 = 218,843.10 : x
2. Step 2: Convert to fraction form
   400,131.77/552,174.03 = 218,843.10/x
3. Step 3: Cross multiply
   400,131.77x = 552,174.03 × 218,843.10
4. Step 4: Simplify right side
   400,131.77x = 120,839,476,464.69
5. Step 5: Solve for x
   x = 120,839,476,464.69/400,131.77
6. Step 6: Final answer
   x = 301,999.21