Finding the Fourth Proportional to 13,387.76, 18,475.25 and 7,419.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,387.76 : 18,475.25 = 7,419.56 : x
2. Step 2: Convert to fraction form
   13,387.76/18,475.25 = 7,419.56/x
3. Step 3: Cross multiply
   13,387.76x = 18,475.25 × 7,419.56
4. Step 4: Simplify right side
   13,387.76x = 137,078,225.89
5. Step 5: Solve for x
   x = 137,078,225.89/13,387.76
6. Step 6: Final answer
   x = 10,239.07