Finding the Fourth Proportional to 12,613.32, 17,406.37 and 7,311.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.32 : 17,406.37 = 7,311.21 : x
2. Step 2: Convert to fraction form
   12,613.32/17,406.37 = 7,311.21/x
3. Step 3: Cross multiply
   12,613.32x = 17,406.37 × 7,311.21
4. Step 4: Simplify right side
   12,613.32x = 127,261,539.38
5. Step 5: Solve for x
   x = 127,261,539.38/12,613.32
6. Step 6: Final answer
   x = 10,089.46