Finding the Fourth Proportional to 9,678.75, 13,356.69 and 5,487

Step by Step Solution

1. Step 1: Write the proportion equation
   9,678.75 : 13,356.69 = 5,487 : x
2. Step 2: Convert to fraction form
   9,678.75/13,356.69 = 5,487/x
3. Step 3: Cross multiply
   9,678.75x = 13,356.69 × 5,487
4. Step 4: Simplify right side
   9,678.75x = 73,288,158.03
5. Step 5: Solve for x
   x = 73,288,158.03/9,678.75
6. Step 6: Final answer
   x = 7,572.07