Finding the Fourth Proportional to 42,196.73, 63,295.10 and 12,613.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,196.73 : 63,295.10 = 12,613.61 : x
2. Step 2: Convert to fraction form
   42,196.73/63,295.10 = 12,613.61/x
3. Step 3: Cross multiply
   42,196.73x = 63,295.10 × 12,613.61
4. Step 4: Simplify right side
   42,196.73x = 798,379,326.77
5. Step 5: Solve for x
   x = 798,379,326.77/42,196.73
6. Step 6: Final answer
   x = 18,920.41