Finding the Fourth Proportional to 9,120.53, 12,585.89 and 5,141.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,120.53 : 12,585.89 = 5,141.63 : x
2. Step 2: Convert to fraction form
   9,120.53/12,585.89 = 5,141.63/x
3. Step 3: Cross multiply
   9,120.53x = 12,585.89 × 5,141.63
4. Step 4: Simplify right side
   9,120.53x = 64,711,995.36
5. Step 5: Solve for x
   x = 64,711,995.36/9,120.53
6. Step 6: Final answer
   x = 7,095.20