Finding the Fourth Proportional to 9,811.50, 13,536.90 and 5,561.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,811.50 : 13,536.90 = 5,561.88 : x
2. Step 2: Convert to fraction form
   9,811.50/13,536.90 = 5,561.88/x
3. Step 3: Cross multiply
   9,811.50x = 13,536.90 × 5,561.88
4. Step 4: Simplify right side
   9,811.50x = 75,290,613.37
5. Step 5: Solve for x
   x = 75,290,613.37/9,811.50
6. Step 6: Final answer
   x = 7,673.71