Finding the Fourth Proportional to 8,620.59, 12,933.72 and 7,077.54

Step by Step Solution

1. Step 1: Write the proportion equation
   8,620.59 : 12,933.72 = 7,077.54 : x
2. Step 2: Convert to fraction form
   8,620.59/12,933.72 = 7,077.54/x
3. Step 3: Cross multiply
   8,620.59x = 12,933.72 × 7,077.54
4. Step 4: Simplify right side
   8,620.59x = 91,538,920.65
5. Step 5: Solve for x
   x = 91,538,920.65/8,620.59
6. Step 6: Final answer
   x = 10,618.64