Finding the Fourth Proportional to 213,384.98, 320,077.71 and 55,613.30

Step by Step Solution

1. Step 1: Write the proportion equation
   213,384.98 : 320,077.71 = 55,613.30 : x
2. Step 2: Convert to fraction form
   213,384.98/320,077.71 = 55,613.30/x
3. Step 3: Cross multiply
   213,384.98x = 320,077.71 × 55,613.30
4. Step 4: Simplify right side
   213,384.98x = 17,800,577,709.54
5. Step 5: Solve for x
   x = 17,800,577,709.54/213,384.98
6. Step 6: Final answer
   x = 83,420.01