Finding the Fourth Proportional to 10,243.08, 15,355.35 and 7,124.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,243.08 : 15,355.35 = 7,124.55 : x
2. Step 2: Convert to fraction form
   10,243.08/15,355.35 = 7,124.55/x
3. Step 3: Cross multiply
   10,243.08x = 15,355.35 × 7,124.55
4. Step 4: Simplify right side
   10,243.08x = 109,399,958.84
5. Step 5: Solve for x
   x = 109,399,958.84/10,243.08
6. Step 6: Final answer
   x = 10,680.38