Finding the Fourth Proportional to 12,111.60, 16,708.06 and 7,387.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.60 : 16,708.06 = 7,387.68 : x
2. Step 2: Convert to fraction form
   12,111.60/16,708.06 = 7,387.68/x
3. Step 3: Cross multiply
   12,111.60x = 16,708.06 × 7,387.68
4. Step 4: Simplify right side
   12,111.60x = 123,433,800.70
5. Step 5: Solve for x
   x = 123,433,800.70/12,111.60
6. Step 6: Final answer
   x = 10,191.37