Finding the Fourth Proportional to 13,141.53, 18,132.61 and 7,551.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,141.53 : 18,132.61 = 7,551.45 : x
2. Step 2: Convert to fraction form
   13,141.53/18,132.61 = 7,551.45/x
3. Step 3: Cross multiply
   13,141.53x = 18,132.61 × 7,551.45
4. Step 4: Simplify right side
   13,141.53x = 136,927,561.06
5. Step 5: Solve for x
   x = 136,927,561.06/13,141.53
6. Step 6: Final answer
   x = 10,419.45