Finding the Fourth Proportional to 12,805.01, 17,670.98 and 7,140.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,805.01 : 17,670.98 = 7,140.10 : x
2. Step 2: Convert to fraction form
   12,805.01/17,670.98 = 7,140.10/x
3. Step 3: Cross multiply
   12,805.01x = 17,670.98 × 7,140.10
4. Step 4: Simplify right side
   12,805.01x = 126,172,564.30
5. Step 5: Solve for x
   x = 126,172,564.30/12,805.01
6. Step 6: Final answer
   x = 9,853.37