Finding the Fourth Proportional to 213,613.18, 320,437.98 and 55,841.38

Step by Step Solution

1. Step 1: Write the proportion equation
   213,613.18 : 320,437.98 = 55,841.38 : x
2. Step 2: Convert to fraction form
   213,613.18/320,437.98 = 55,841.38/x
3. Step 3: Cross multiply
   213,613.18x = 320,437.98 × 55,841.38
4. Step 4: Simplify right side
   213,613.18x = 17,893,699,007.61
5. Step 5: Solve for x
   x = 17,893,699,007.61/213,613.18
6. Step 6: Final answer
   x = 83,766.83