Finding the Fourth Proportional to 12,830.27, 17,713.86 and 9,840.35

Step by Step Solution

1. Step 1: Write the proportion equation
   12,830.27 : 17,713.86 = 9,840.35 : x
2. Step 2: Convert to fraction form
   12,830.27/17,713.86 = 9,840.35/x
3. Step 3: Cross multiply
   12,830.27x = 17,713.86 × 9,840.35
4. Step 4: Simplify right side
   12,830.27x = 174,310,582.25
5. Step 5: Solve for x
   x = 174,310,582.25/12,830.27
6. Step 6: Final answer
   x = 13,585.89