Finding the Fourth Proportional to 28,311.69, 42,468.50 and 7,535.21

Step by Step Solution

1. Step 1: Write the proportion equation
   28,311.69 : 42,468.50 = 7,535.21 : x
2. Step 2: Convert to fraction form
   28,311.69/42,468.50 = 7,535.21/x
3. Step 3: Cross multiply
   28,311.69x = 42,468.50 × 7,535.21
4. Step 4: Simplify right side
   28,311.69x = 320,009,065.89
5. Step 5: Solve for x
   x = 320,009,065.89/28,311.69
6. Step 6: Final answer
   x = 11,303.07