Finding the Fourth Proportional to 13,510.28, 18,643.86 and 7,541.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510.28 : 18,643.86 = 7,541.60 : x
2. Step 2: Convert to fraction form
   13,510.28/18,643.86 = 7,541.60/x
3. Step 3: Cross multiply
   13,510.28x = 18,643.86 × 7,541.60
4. Step 4: Simplify right side
   13,510.28x = 140,604,534.58
5. Step 5: Solve for x
   x = 140,604,534.58/13,510.28
6. Step 6: Final answer
   x = 10,407.23