Finding the Fourth Proportional to 6,488.79, 8,956.49 and 5,613.99

Step by Step Solution

1. Step 1: Write the proportion equation
   6,488.79 : 8,956.49 = 5,613.99 : x
2. Step 2: Convert to fraction form
   6,488.79/8,956.49 = 5,613.99/x
3. Step 3: Cross multiply
   6,488.79x = 8,956.49 × 5,613.99
4. Step 4: Simplify right side
   6,488.79x = 50,281,645.30
5. Step 5: Solve for x
   x = 50,281,645.30/6,488.79
6. Step 6: Final answer
   x = 7,749.00