Finding the Fourth Proportional to 11,121.86, 16,695.76 and 7,374.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,121.86 : 16,695.76 = 7,374.78 : x
2. Step 2: Convert to fraction form
   11,121.86/16,695.76 = 7,374.78/x
3. Step 3: Cross multiply
   11,121.86x = 16,695.76 × 7,374.78
4. Step 4: Simplify right side
   11,121.86x = 123,127,578.60
5. Step 5: Solve for x
   x = 123,127,578.60/11,121.86
6. Step 6: Final answer
   x = 11,070.78