Finding the Fourth Proportional to 13,200.23, 18,215.88 and 7,892.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,200.23 : 18,215.88 = 7,892.30 : x
2. Step 2: Convert to fraction form
   13,200.23/18,215.88 = 7,892.30/x
3. Step 3: Cross multiply
   13,200.23x = 18,215.88 × 7,892.30
4. Step 4: Simplify right side
   13,200.23x = 143,765,189.72
5. Step 5: Solve for x
   x = 143,765,189.72/13,200.23
6. Step 6: Final answer
   x = 10,891.11