Finding the Fourth Proportional to 13,499.02, 18,628.52 and 7,449.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.02 : 18,628.52 = 7,449.31 : x
2. Step 2: Convert to fraction form
   13,499.02/18,628.52 = 7,449.31/x
3. Step 3: Cross multiply
   13,499.02x = 18,628.52 × 7,449.31
4. Step 4: Simplify right side
   13,499.02x = 138,769,620.32
5. Step 5: Solve for x
   x = 138,769,620.32/13,499.02
6. Step 6: Final answer
   x = 10,279.98