Finding the Fourth Proportional to 13,036.62, 17,990.31 and 7,447.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,036.62 : 17,990.31 = 7,447.50 : x
2. Step 2: Convert to fraction form
   13,036.62/17,990.31 = 7,447.50/x
3. Step 3: Cross multiply
   13,036.62x = 17,990.31 × 7,447.50
4. Step 4: Simplify right side
   13,036.62x = 133,982,833.73
5. Step 5: Solve for x
   x = 133,982,833.73/13,036.62
6. Step 6: Final answer
   x = 10,277.42