Finding the Fourth Proportional to 1,123,613.37, 1,685,587.86 and 413,587.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,613.37 : 1,685,587.86 = 413,587.42 : x
2. Step 2: Convert to fraction form
   1,123,613.37/1,685,587.86 = 413,587.42/x
3. Step 3: Cross multiply
   1,123,613.37x = 1,685,587.86 × 413,587.42
4. Step 4: Simplify right side
   1,123,613.37x = 697,137,929,986.75
5. Step 5: Solve for x
   x = 697,137,929,986.75/1,123,613.37
6. Step 6: Final answer
   x = 620,442.89