Finding the Fourth Proportional to 11,641.31, 16,055.58 and 7,157.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,641.31 : 16,055.58 = 7,157.05 : x
2. Step 2: Convert to fraction form
   11,641.31/16,055.58 = 7,157.05/x
3. Step 3: Cross multiply
   11,641.31x = 16,055.58 × 7,157.05
4. Step 4: Simplify right side
   11,641.31x = 114,910,575.54
5. Step 5: Solve for x
   x = 114,910,575.54/11,641.31
6. Step 6: Final answer
   x = 9,870.93