Finding the Fourth Proportional to 400,390.72, 552,515.32 and 219,066.52

Step by Step Solution

1. Step 1: Write the proportion equation
   400,390.72 : 552,515.32 = 219,066.52 : x
2. Step 2: Convert to fraction form
   400,390.72/552,515.32 = 219,066.52/x
3. Step 3: Cross multiply
   400,390.72x = 552,515.32 × 219,066.52
4. Step 4: Simplify right side
   400,390.72x = 121,037,608,399.09
5. Step 5: Solve for x
   x = 121,037,608,399.09/400,390.72
6. Step 6: Final answer
   x = 302,298.74