Finding the Fourth Proportional to 23,053.92, 31,812.72 and 13,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,053.92 : 31,812.72 = 13,620.72 : x
2. Step 2: Convert to fraction form
   23,053.92/31,812.72 = 13,620.72/x
3. Step 3: Cross multiply
   23,053.92x = 31,812.72 × 13,620.72
4. Step 4: Simplify right side
   23,053.92x = 433,312,151.56
5. Step 5: Solve for x
   x = 433,312,151.56/23,053.92
6. Step 6: Final answer
   x = 18,795.60