Finding the Fourth Proportional to 13,399.32, 18,489.83 and 7,430.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.32 : 18,489.83 = 7,430.88 : x
2. Step 2: Convert to fraction form
   13,399.32/18,489.83 = 7,430.88/x
3. Step 3: Cross multiply
   13,399.32x = 18,489.83 × 7,430.88
4. Step 4: Simplify right side
   13,399.32x = 137,395,670.80
5. Step 5: Solve for x
   x = 137,395,670.80/13,399.32
6. Step 6: Final answer
   x = 10,253.93