Finding the Fourth Proportional to 13,100.28, 18,077.82 and 7,131.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,100.28 : 18,077.82 = 7,131.98 : x
2. Step 2: Convert to fraction form
   13,100.28/18,077.82 = 7,131.98/x
3. Step 3: Cross multiply
   13,100.28x = 18,077.82 × 7,131.98
4. Step 4: Simplify right side
   13,100.28x = 128,930,560.29
5. Step 5: Solve for x
   x = 128,930,560.29/13,100.28
6. Step 6: Final answer
   x = 9,841.82