Finding the Fourth Proportional to 11,081.70, 16,641.36 and 7,407.54

Step by Step Solution

1. Step 1: Write the proportion equation
   11,081.70 : 16,641.36 = 7,407.54 : x
2. Step 2: Convert to fraction form
   11,081.70/16,641.36 = 7,407.54/x
3. Step 3: Cross multiply
   11,081.70x = 16,641.36 × 7,407.54
4. Step 4: Simplify right side
   11,081.70x = 123,271,539.85
5. Step 5: Solve for x
   x = 123,271,539.85/11,081.70
6. Step 6: Final answer
   x = 11,123.88