Finding the Fourth Proportional to 213,032.45, 318,300.76 and 205,582.30

Step by Step Solution

1. Step 1: Write the proportion equation
   213,032.45 : 318,300.76 = 205,582.30 : x
2. Step 2: Convert to fraction form
   213,032.45/318,300.76 = 205,582.30/x
3. Step 3: Cross multiply
   213,032.45x = 318,300.76 × 205,582.30
4. Step 4: Simplify right side
   213,032.45x = 65,437,002,332.55
5. Step 5: Solve for x
   x = 65,437,002,332.55/213,032.45
6. Step 6: Final answer
   x = 307,169.18