Finding the Fourth Proportional to 15,429.96, 23,131.98 and 10,485.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,429.96 : 23,131.98 = 10,485.72 : x
2. Step 2: Convert to fraction form
   15,429.96/23,131.98 = 10,485.72/x
3. Step 3: Cross multiply
   15,429.96x = 23,131.98 × 10,485.72
4. Step 4: Simplify right side
   15,429.96x = 242,555,465.33
5. Step 5: Solve for x
   x = 242,555,465.33/15,429.96
6. Step 6: Final answer
   x = 15,719.77