Finding the Fourth Proportional to 11,900.57, 16,422.81 and 7,184.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,900.57 : 16,422.81 = 7,184.89 : x
2. Step 2: Convert to fraction form
   11,900.57/16,422.81 = 7,184.89/x
3. Step 3: Cross multiply
   11,900.57x = 16,422.81 × 7,184.89
4. Step 4: Simplify right side
   11,900.57x = 117,996,001.23
5. Step 5: Solve for x
   x = 117,996,001.23/11,900.57
6. Step 6: Final answer
   x = 9,915.16