Finding the Fourth Proportional to 2,553.57, 3,830.60 and 993.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,553.57 : 3,830.60 = 993.69 : x
2. Step 2: Convert to fraction form
   2,553.57/3,830.60 = 993.69/x
3. Step 3: Cross multiply
   2,553.57x = 3,830.60 × 993.69
4. Step 4: Simplify right side
   2,553.57x = 3,806,428.91
5. Step 5: Solve for x
   x = 3,806,428.91/2,553.57
6. Step 6: Final answer
   x = 1,490.63