Finding the Fourth Proportional to 9,486.72, 13,091.63 and 5,508.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,486.72 : 13,091.63 = 5,508.81 : x
2. Step 2: Convert to fraction form
   9,486.72/13,091.63 = 5,508.81/x
3. Step 3: Cross multiply
   9,486.72x = 13,091.63 × 5,508.81
4. Step 4: Simplify right side
   9,486.72x = 72,119,274.72
5. Step 5: Solve for x
   x = 72,119,274.72/9,486.72
6. Step 6: Final answer
   x = 7,602.13