Finding the Fourth Proportional to 13,112.52, 18,093.16 and 7,807.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,112.52 : 18,093.16 = 7,807.20 : x
2. Step 2: Convert to fraction form
   13,112.52/18,093.16 = 7,807.20/x
3. Step 3: Cross multiply
   13,112.52x = 18,093.16 × 7,807.20
4. Step 4: Simplify right side
   13,112.52x = 141,256,918.75
5. Step 5: Solve for x
   x = 141,256,918.75/13,112.52
6. Step 6: Final answer
   x = 10,772.68