Finding the Fourth Proportional to 13,099.49, 18,077.48 and 7,131.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,099.49 : 18,077.48 = 7,131.34 : x
2. Step 2: Convert to fraction form
   13,099.49/18,077.48 = 7,131.34/x
3. Step 3: Cross multiply
   13,099.49x = 18,077.48 × 7,131.34
4. Step 4: Simplify right side
   13,099.49x = 128,916,656.22
5. Step 5: Solve for x
   x = 128,916,656.22/13,099.49
6. Step 6: Final answer
   x = 9,841.35