Finding the Fourth Proportional to 13,372.72, 20,088.10 and 10,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,372.72 : 20,088.10 = 10,456.72 : x
2. Step 2: Convert to fraction form
   13,372.72/20,088.10 = 10,456.72/x
3. Step 3: Cross multiply
   13,372.72x = 20,088.10 × 10,456.72
4. Step 4: Simplify right side
   13,372.72x = 210,055,637.03
5. Step 5: Solve for x
   x = 210,055,637.03/13,372.72
6. Step 6: Final answer
   x = 15,707.77