Finding the Fourth Proportional to 9,877.80, 14,815.42 and 3,721

Step by Step Solution

1. Step 1: Write the proportion equation
   9,877.80 : 14,815.42 = 3,721 : x
2. Step 2: Convert to fraction form
   9,877.80/14,815.42 = 3,721/x
3. Step 3: Cross multiply
   9,877.80x = 14,815.42 × 3,721
4. Step 4: Simplify right side
   9,877.80x = 55,128,177.82
5. Step 5: Solve for x
   x = 55,128,177.82/9,877.80
6. Step 6: Final answer
   x = 5,581.02