Finding the Fourth Proportional to 10,300.38, 14,215.95 and 7,643.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,300.38 : 14,215.95 = 7,643.58 : x
2. Step 2: Convert to fraction form
   10,300.38/14,215.95 = 7,643.58/x
3. Step 3: Cross multiply
   10,300.38x = 14,215.95 × 7,643.58
4. Step 4: Simplify right side
   10,300.38x = 108,660,751.10
5. Step 5: Solve for x
   x = 108,660,751.10/10,300.38
6. Step 6: Final answer
   x = 10,549.20