Finding the Fourth Proportional to 11,428.57, 15,761.16 and 7,180.03

Step by Step Solution

1. Step 1: Write the proportion equation
   11,428.57 : 15,761.16 = 7,180.03 : x
2. Step 2: Convert to fraction form
   11,428.57/15,761.16 = 7,180.03/x
3. Step 3: Cross multiply
   11,428.57x = 15,761.16 × 7,180.03
4. Step 4: Simplify right side
   11,428.57x = 113,165,601.63
5. Step 5: Solve for x
   x = 113,165,601.63/11,428.57
6. Step 6: Final answer
   x = 9,901.99