Finding the Fourth Proportional to 13,096.53, 18,073.58 and 7,128.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,096.53 : 18,073.58 = 7,128.45 : x
2. Step 2: Convert to fraction form
   13,096.53/18,073.58 = 7,128.45/x
3. Step 3: Cross multiply
   13,096.53x = 18,073.58 × 7,128.45
4. Step 4: Simplify right side
   13,096.53x = 128,836,575.71
5. Step 5: Solve for x
   x = 128,836,575.71/13,096.53
6. Step 6: Final answer
   x = 9,837.46