Finding the Fourth Proportional to 11,929.80, 17,897.94 and 3,609.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,929.80 : 17,897.94 = 3,609.48 : x
2. Step 2: Convert to fraction form
   11,929.80/17,897.94 = 3,609.48/x
3. Step 3: Cross multiply
   11,929.80x = 17,897.94 × 3,609.48
4. Step 4: Simplify right side
   11,929.80x = 64,602,256.47
5. Step 5: Solve for x
   x = 64,602,256.47/11,929.80
6. Step 6: Final answer
   x = 5,415.20