Finding the Fourth Proportional to 13,397.96, 18,489.61 and 7,430.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,397.96 : 18,489.61 = 7,430.18 : x
2. Step 2: Convert to fraction form
   13,397.96/18,489.61 = 7,430.18/x
3. Step 3: Cross multiply
   13,397.96x = 18,489.61 × 7,430.18
4. Step 4: Simplify right side
   13,397.96x = 137,381,130.43
5. Step 5: Solve for x
   x = 137,381,130.43/13,397.96
6. Step 6: Final answer
   x = 10,253.89