Finding the Fourth Proportional to 8,642.69, 12,964.34 and 4,943.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,642.69 : 12,964.34 = 4,943.22 : x
2. Step 2: Convert to fraction form
   8,642.69/12,964.34 = 4,943.22/x
3. Step 3: Cross multiply
   8,642.69x = 12,964.34 × 4,943.22
4. Step 4: Simplify right side
   8,642.69x = 64,085,584.77
5. Step 5: Solve for x
   x = 64,085,584.77/8,642.69
6. Step 6: Final answer
   x = 7,415.00