Finding the Fourth Proportional to 9,160.58, 12,641.15 and 5,181.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,160.58 : 12,641.15 = 5,181.61 : x
2. Step 2: Convert to fraction form
   9,160.58/12,641.15 = 5,181.61/x
3. Step 3: Cross multiply
   9,160.58x = 12,641.15 × 5,181.61
4. Step 4: Simplify right side
   9,160.58x = 65,501,490.60
5. Step 5: Solve for x
   x = 65,501,490.60/9,160.58
6. Step 6: Final answer
   x = 7,150.36