Finding the Fourth Proportional to 12,847.89, 17,730.47 and 7,182.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,847.89 : 17,730.47 = 7,182.45 : x
2. Step 2: Convert to fraction form
   12,847.89/17,730.47 = 7,182.45/x
3. Step 3: Cross multiply
   12,847.89x = 17,730.47 × 7,182.45
4. Step 4: Simplify right side
   12,847.89x = 127,348,214.25
5. Step 5: Solve for x
   x = 127,348,214.25/12,847.89
6. Step 6: Final answer
   x = 9,911.99