Finding the Fourth Proportional to 28,353.60, 42,533.88 and 9,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,353.60 : 42,533.88 = 9,636.72 : x
2. Step 2: Convert to fraction form
   28,353.60/42,533.88 = 9,636.72/x
3. Step 3: Cross multiply
   28,353.60x = 42,533.88 × 9,636.72
4. Step 4: Simplify right side
   28,353.60x = 409,887,043.89
5. Step 5: Solve for x
   x = 409,887,043.89/28,353.60
6. Step 6: Final answer
   x = 14,456.26