Finding the Fourth Proportional to 12,670.89, 17,485.13 and 7,005.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,670.89 : 17,485.13 = 7,005.31 : x
2. Step 2: Convert to fraction form
   12,670.89/17,485.13 = 7,005.31/x
3. Step 3: Cross multiply
   12,670.89x = 17,485.13 × 7,005.31
4. Step 4: Simplify right side
   12,670.89x = 122,488,756.01
5. Step 5: Solve for x
   x = 122,488,756.01/12,670.89
6. Step 6: Final answer
   x = 9,666.94