Finding the Fourth Proportional to 13,151.56, 18,148.42 and 7,487.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,151.56 : 18,148.42 = 7,487.69 : x
2. Step 2: Convert to fraction form
   13,151.56/18,148.42 = 7,487.69/x
3. Step 3: Cross multiply
   13,151.56x = 18,148.42 × 7,487.69
4. Step 4: Simplify right side
   13,151.56x = 135,889,705.51
5. Step 5: Solve for x
   x = 135,889,705.51/13,151.56
6. Step 6: Final answer
   x = 10,332.59