Finding the Fourth Proportional to 53,168.42, 79,764.30 and 15,725.57

Step by Step Solution

1. Step 1: Write the proportion equation
   53,168.42 : 79,764.30 = 15,725.57 : x
2. Step 2: Convert to fraction form
   53,168.42/79,764.30 = 15,725.57/x
3. Step 3: Cross multiply
   53,168.42x = 79,764.30 × 15,725.57
4. Step 4: Simplify right side
   53,168.42x = 1,254,339,083.15
5. Step 5: Solve for x
   x = 1,254,339,083.15/53,168.42
6. Step 6: Final answer
   x = 23,591.81