Finding the Fourth Proportional to 12,528.60, 17,306.34 and 10,028.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,528.60 : 17,306.34 = 10,028.61 : x
2. Step 2: Convert to fraction form
   12,528.60/17,306.34 = 10,028.61/x
3. Step 3: Cross multiply
   12,528.60x = 17,306.34 × 10,028.61
4. Step 4: Simplify right side
   12,528.60x = 173,558,534.39
5. Step 5: Solve for x
   x = 173,558,534.39/12,528.60
6. Step 6: Final answer
   x = 13,852.99