Finding the Fourth Proportional to 12,445.54, 17,175.72 and 7,141.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.54 : 17,175.72 = 7,141.66 : x
2. Step 2: Convert to fraction form
   12,445.54/17,175.72 = 7,141.66/x
3. Step 3: Cross multiply
   12,445.54x = 17,175.72 × 7,141.66
4. Step 4: Simplify right side
   12,445.54x = 122,663,152.50
5. Step 5: Solve for x
   x = 122,663,152.50/12,445.54
6. Step 6: Final answer
   x = 9,855.99