Finding the Fourth Proportional to 12,558.32, 17,333.61 and 7,256.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,558.32 : 17,333.61 = 7,256.21 : x
2. Step 2: Convert to fraction form
   12,558.32/17,333.61 = 7,256.21/x
3. Step 3: Cross multiply
   12,558.32x = 17,333.61 × 7,256.21
4. Step 4: Simplify right side
   12,558.32x = 125,776,227.55
5. Step 5: Solve for x
   x = 125,776,227.55/12,558.32
6. Step 6: Final answer
   x = 10,015.37