Finding the Fourth Proportional to 11,405.76, 15,734.52 and 7,425.40

Step by Step Solution

1. Step 1: Write the proportion equation
   11,405.76 : 15,734.52 = 7,425.40 : x
2. Step 2: Convert to fraction form
   11,405.76/15,734.52 = 7,425.40/x
3. Step 3: Cross multiply
   11,405.76x = 15,734.52 × 7,425.40
4. Step 4: Simplify right side
   11,405.76x = 116,835,104.81
5. Step 5: Solve for x
   x = 116,835,104.81/11,405.76
6. Step 6: Final answer
   x = 10,243.52