Finding the Fourth Proportional to 9,072.69, 13,590.81 and 6,612.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.69 : 13,590.81 = 6,612.72 : x
2. Step 2: Convert to fraction form
   9,072.69/13,590.81 = 6,612.72/x
3. Step 3: Cross multiply
   9,072.69x = 13,590.81 × 6,612.72
4. Step 4: Simplify right side
   9,072.69x = 89,872,221.10
5. Step 5: Solve for x
   x = 89,872,221.10/9,072.69
6. Step 6: Final answer
   x = 9,905.80