Finding the Fourth Proportional to 9,811.38, 13,536.70 and 5,561.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,811.38 : 13,536.70 = 5,561.76 : x
2. Step 2: Convert to fraction form
   9,811.38/13,536.70 = 5,561.76/x
3. Step 3: Cross multiply
   9,811.38x = 13,536.70 × 5,561.76
4. Step 4: Simplify right side
   9,811.38x = 75,287,876.59
5. Step 5: Solve for x
   x = 75,287,876.59/9,811.38
6. Step 6: Final answer
   x = 7,673.53