Finding the Fourth Proportional to 11,657.93, 16,081.30 and 7,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,657.93 : 16,081.30 = 7,180.72 : x
2. Step 2: Convert to fraction form
   11,657.93/16,081.30 = 7,180.72/x
3. Step 3: Cross multiply
   11,657.93x = 16,081.30 × 7,180.72
4. Step 4: Simplify right side
   11,657.93x = 115,475,281.31
5. Step 5: Solve for x
   x = 115,475,281.31/11,657.93
6. Step 6: Final answer
   x = 9,905.30