Finding the Fourth Proportional to 11,154.69, 15,392.34 and 7,172.83

Step by Step Solution

1. Step 1: Write the proportion equation
   11,154.69 : 15,392.34 = 7,172.83 : x
2. Step 2: Convert to fraction form
   11,154.69/15,392.34 = 7,172.83/x
3. Step 3: Cross multiply
   11,154.69x = 15,392.34 × 7,172.83
4. Step 4: Simplify right side
   11,154.69x = 110,406,638.12
5. Step 5: Solve for x
   x = 110,406,638.12/11,154.69
6. Step 6: Final answer
   x = 9,897.78