Finding the Fourth Proportional to 9,810.91, 13,538.39 and 5,561.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,810.91 : 13,538.39 = 5,561.54 : x
2. Step 2: Convert to fraction form
   9,810.91/13,538.39 = 5,561.54/x
3. Step 3: Cross multiply
   9,810.91x = 13,538.39 × 5,561.54
4. Step 4: Simplify right side
   9,810.91x = 75,294,303.56
5. Step 5: Solve for x
   x = 75,294,303.56/9,810.91
6. Step 6: Final answer
   x = 7,674.55