Finding the Fourth Proportional to 12,613.86, 17,405.31 and 7,307.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,613.86 : 17,405.31 = 7,307.70 : x
2. Step 2: Convert to fraction form
   12,613.86/17,405.31 = 7,307.70/x
3. Step 3: Cross multiply
   12,613.86x = 17,405.31 × 7,307.70
4. Step 4: Simplify right side
   12,613.86x = 127,192,783.89
5. Step 5: Solve for x
   x = 127,192,783.89/12,613.86
6. Step 6: Final answer
   x = 10,083.57