Finding the Fourth Proportional to 13,083.72, 18,054.72 and 7,115.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,083.72 : 18,054.72 = 7,115.32 : x
2. Step 2: Convert to fraction form
   13,083.72/18,054.72 = 7,115.32/x
3. Step 3: Cross multiply
   13,083.72x = 18,054.72 × 7,115.32
4. Step 4: Simplify right side
   13,083.72x = 128,465,110.31
5. Step 5: Solve for x
   x = 128,465,110.31/13,083.72
6. Step 6: Final answer
   x = 9,818.70