Finding the Fourth Proportional to 12,445.83, 17,173.89 and 7,140.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.83 : 17,173.89 = 7,140.51 : x
2. Step 2: Convert to fraction form
   12,445.83/17,173.89 = 7,140.51/x
3. Step 3: Cross multiply
   12,445.83x = 17,173.89 × 7,140.51
4. Step 4: Simplify right side
   12,445.83x = 122,630,333.28
5. Step 5: Solve for x
   x = 122,630,333.28/12,445.83
6. Step 6: Final answer
   x = 9,853.13