Finding the Fourth Proportional to 7,421.81, 10,230.59 and 5,530.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,421.81 : 10,230.59 = 5,530.50 : x
2. Step 2: Convert to fraction form
   7,421.81/10,230.59 = 5,530.50/x
3. Step 3: Cross multiply
   7,421.81x = 10,230.59 × 5,530.50
4. Step 4: Simplify right side
   7,421.81x = 56,580,291.82
5. Step 5: Solve for x
   x = 56,580,291.82/7,421.81
6. Step 6: Final answer
   x = 7,623.52