Finding the Fourth Proportional to 28,300.94, 39,059.00 and 18,258.60

Step by Step Solution

1. Step 1: Write the proportion equation
   28,300.94 : 39,059.00 = 18,258.60 : x
2. Step 2: Convert to fraction form
   28,300.94/39,059.00 = 18,258.60/x
3. Step 3: Cross multiply
   28,300.94x = 39,059.00 × 18,258.60
4. Step 4: Simplify right side
   28,300.94x = 713,162,568.82
5. Step 5: Solve for x
   x = 713,162,568.82/28,300.94
6. Step 6: Final answer
   x = 25,199.25