Finding the Fourth Proportional to 12,564.80, 17,341.60 and 7,258.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,564.80 : 17,341.60 = 7,258.72 : x
2. Step 2: Convert to fraction form
   12,564.80/17,341.60 = 7,258.72/x
3. Step 3: Cross multiply
   12,564.80x = 17,341.60 × 7,258.72
4. Step 4: Simplify right side
   12,564.80x = 125,877,818.75
5. Step 5: Solve for x
   x = 125,877,818.75/12,564.80
6. Step 6: Final answer
   x = 10,018.29