Finding the Fourth Proportional to 15,498.06, 21,383.78 and 8,782.14

Step by Step Solution

1. Step 1: Write the proportion equation
   15,498.06 : 21,383.78 = 8,782.14 : x
2. Step 2: Convert to fraction form
   15,498.06/21,383.78 = 8,782.14/x
3. Step 3: Cross multiply
   15,498.06x = 21,383.78 × 8,782.14
4. Step 4: Simplify right side
   15,498.06x = 187,795,349.69
5. Step 5: Solve for x
   x = 187,795,349.69/15,498.06
6. Step 6: Final answer
   x = 12,117.35