Finding the Fourth Proportional to 13,764.79, 18,995.61 and 7,477.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,764.79 : 18,995.61 = 7,477.15 : x
2. Step 2: Convert to fraction form
   13,764.79/18,995.61 = 7,477.15/x
3. Step 3: Cross multiply
   13,764.79x = 18,995.61 × 7,477.15
4. Step 4: Simplify right side
   13,764.79x = 142,033,025.31
5. Step 5: Solve for x
   x = 142,033,025.31/13,764.79
6. Step 6: Final answer
   x = 10,318.58