Finding the Fourth Proportional to 7,087.72, 10,618.74 and 3,964

Step by Step Solution

1. Step 1: Write the proportion equation
   7,087.72 : 10,618.74 = 3,964 : x
2. Step 2: Convert to fraction form
   7,087.72/10,618.74 = 3,964/x
3. Step 3: Cross multiply
   7,087.72x = 10,618.74 × 3,964
4. Step 4: Simplify right side
   7,087.72x = 42,092,685.36
5. Step 5: Solve for x
   x = 42,092,685.36/7,087.72
6. Step 6: Final answer
   x = 5,938.82