Finding the Fourth Proportional to 23,190.72, 31,953.12 and 15,725.76

Step by Step Solution

1. Step 1: Write the proportion equation
   23,190.72 : 31,953.12 = 15,725.76 : x
2. Step 2: Convert to fraction form
   23,190.72/31,953.12 = 15,725.76/x
3. Step 3: Cross multiply
   23,190.72x = 31,953.12 × 15,725.76
4. Step 4: Simplify right side
   23,190.72x = 502,487,096.37
5. Step 5: Solve for x
   x = 502,487,096.37/23,190.72
6. Step 6: Final answer
   x = 21,667.59