Finding the Fourth Proportional to 10,087.65, 13,920.93 and 5,611.46

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.65 : 13,920.93 = 5,611.46 : x
2. Step 2: Convert to fraction form
   10,087.65/13,920.93 = 5,611.46/x
3. Step 3: Cross multiply
   10,087.65x = 13,920.93 × 5,611.46
4. Step 4: Simplify right side
   10,087.65x = 78,116,672.25
5. Step 5: Solve for x
   x = 78,116,672.25/10,087.65
6. Step 6: Final answer
   x = 7,743.79