Finding the Fourth Proportional to 10,972.72, 16,442.65 and 10,152.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,972.72 : 16,442.65 = 10,152.60 : x
2. Step 2: Convert to fraction form
   10,972.72/16,442.65 = 10,152.60/x
3. Step 3: Cross multiply
   10,972.72x = 16,442.65 × 10,152.60
4. Step 4: Simplify right side
   10,972.72x = 166,935,648.39
5. Step 5: Solve for x
   x = 166,935,648.39/10,972.72
6. Step 6: Final answer
   x = 15,213.70