Finding the Fourth Proportional to 13,042.72, 17,994.56 and 7,376.80

Step by Step Solution

1. Step 1: Write the proportion equation
   13,042.72 : 17,994.56 = 7,376.80 : x
2. Step 2: Convert to fraction form
   13,042.72/17,994.56 = 7,376.80/x
3. Step 3: Cross multiply
   13,042.72x = 17,994.56 × 7,376.80
4. Step 4: Simplify right side
   13,042.72x = 132,742,270.21
5. Step 5: Solve for x
   x = 132,742,270.21/13,042.72
6. Step 6: Final answer
   x = 10,177.50