Finding the Fourth Proportional to 10,898.72, 15,019.80 and 7,749.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,898.72 : 15,019.80 = 7,749.44 : x
2. Step 2: Convert to fraction form
   10,898.72/15,019.80 = 7,749.44/x
3. Step 3: Cross multiply
   10,898.72x = 15,019.80 × 7,749.44
4. Step 4: Simplify right side
   10,898.72x = 116,395,038.91
5. Step 5: Solve for x
   x = 116,395,038.91/10,898.72
6. Step 6: Final answer
   x = 10,679.70