Finding the Fourth Proportional to 13,009.69, 17,953.37 and 7,420.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,009.69 : 17,953.37 = 7,420.69 : x
2. Step 2: Convert to fraction form
   13,009.69/17,953.37 = 7,420.69/x
3. Step 3: Cross multiply
   13,009.69x = 17,953.37 × 7,420.69
4. Step 4: Simplify right side
   13,009.69x = 133,226,366.89
5. Step 5: Solve for x
   x = 133,226,366.89/13,009.69
6. Step 6: Final answer
   x = 10,240.55