Finding the Fourth Proportional to 13,036.87, 17,990.77 and 7,372.73

Step by Step Solution

1. Step 1: Write the proportion equation
   13,036.87 : 17,990.77 = 7,372.73 : x
2. Step 2: Convert to fraction form
   13,036.87/17,990.77 = 7,372.73/x
3. Step 3: Cross multiply
   13,036.87x = 17,990.77 × 7,372.73
4. Step 4: Simplify right side
   13,036.87x = 132,641,076.43
5. Step 5: Solve for x
   x = 132,641,076.43/13,036.87
6. Step 6: Final answer
   x = 10,174.31