Finding the Fourth Proportional to 11,852.31, 16,356.29 and 7,139.73

Step by Step Solution

1. Step 1: Write the proportion equation
   11,852.31 : 16,356.29 = 7,139.73 : x
2. Step 2: Convert to fraction form
   11,852.31/16,356.29 = 7,139.73/x
3. Step 3: Cross multiply
   11,852.31x = 16,356.29 × 7,139.73
4. Step 4: Simplify right side
   11,852.31x = 116,779,458.70
5. Step 5: Solve for x
   x = 116,779,458.70/11,852.31
6. Step 6: Final answer
   x = 9,852.89