Finding the Fourth Proportional to 9,810.28, 13,536.84 and 5,561.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,810.28 : 13,536.84 = 5,561.74 : x
2. Step 2: Convert to fraction form
   9,810.28/13,536.84 = 5,561.74/x
3. Step 3: Cross multiply
   9,810.28x = 13,536.84 × 5,561.74
4. Step 4: Simplify right side
   9,810.28x = 75,288,384.50
5. Step 5: Solve for x
   x = 75,288,384.50/9,810.28
6. Step 6: Final answer
   x = 7,674.44