Finding the Fourth Proportional to 13,145.67, 18,141.29 and 7,177.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.67 : 18,141.29 = 7,177.59 : x
2. Step 2: Convert to fraction form
   13,145.67/18,141.29 = 7,177.59/x
3. Step 3: Cross multiply
   13,145.67x = 18,141.29 × 7,177.59
4. Step 4: Simplify right side
   13,145.67x = 130,210,705.80
5. Step 5: Solve for x
   x = 130,210,705.80/13,145.67
6. Step 6: Final answer
   x = 9,905.22