Finding the Fourth Proportional to 12,445.85, 17,167.34 and 7,967.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.85 : 17,167.34 = 7,967.97 : x
2. Step 2: Convert to fraction form
   12,445.85/17,167.34 = 7,967.97/x
3. Step 3: Cross multiply
   12,445.85x = 17,167.34 × 7,967.97
4. Step 4: Simplify right side
   12,445.85x = 136,788,870.02
5. Step 5: Solve for x
   x = 136,788,870.02/12,445.85
6. Step 6: Final answer
   x = 10,990.72