Finding the Fourth Proportional to 13,095.78, 18,071.61 and 7,127.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,095.78 : 18,071.61 = 7,127.49 : x
2. Step 2: Convert to fraction form
   13,095.78/18,071.61 = 7,127.49/x
3. Step 3: Cross multiply
   13,095.78x = 18,071.61 × 7,127.49
4. Step 4: Simplify right side
   13,095.78x = 128,805,260.60
5. Step 5: Solve for x
   x = 128,805,260.60/13,095.78
6. Step 6: Final answer
   x = 9,835.63