Finding the Fourth Proportional to 9,619.69, 13,275.35 and 5,643.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,619.69 : 13,275.35 = 5,643.67 : x
2. Step 2: Convert to fraction form
   9,619.69/13,275.35 = 5,643.67/x
3. Step 3: Cross multiply
   9,619.69x = 13,275.35 × 5,643.67
4. Step 4: Simplify right side
   9,619.69x = 74,921,694.53
5. Step 5: Solve for x
   x = 74,921,694.53/9,619.69
6. Step 6: Final answer
   x = 7,788.37