Finding the Fourth Proportional to 372,447.39, 513,941.83 and 209,066.47

Step by Step Solution

1. Step 1: Write the proportion equation
   372,447.39 : 513,941.83 = 209,066.47 : x
2. Step 2: Convert to fraction form
   372,447.39/513,941.83 = 209,066.47/x
3. Step 3: Cross multiply
   372,447.39x = 513,941.83 × 209,066.47
4. Step 4: Simplify right side
   372,447.39x = 107,448,002,375.92
5. Step 5: Solve for x
   x = 107,448,002,375.92/372,447.39
6. Step 6: Final answer
   x = 288,491.76