Finding the Fourth Proportional to 12,776.21, 17,630.58 and 7,398.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,776.21 : 17,630.58 = 7,398.38 : x
2. Step 2: Convert to fraction form
   12,776.21/17,630.58 = 7,398.38/x
3. Step 3: Cross multiply
   12,776.21x = 17,630.58 × 7,398.38
4. Step 4: Simplify right side
   12,776.21x = 130,437,730.46
5. Step 5: Solve for x
   x = 130,437,730.46/12,776.21
6. Step 6: Final answer
   x = 10,209.42