Finding the Fourth Proportional to 14,354.18, 19,806.38 and 7,980.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,354.18 : 19,806.38 = 7,980.59 : x
2. Step 2: Convert to fraction form
   14,354.18/19,806.38 = 7,980.59/x
3. Step 3: Cross multiply
   14,354.18x = 19,806.38 × 7,980.59
4. Step 4: Simplify right side
   14,354.18x = 158,066,607.78
5. Step 5: Solve for x
   x = 158,066,607.78/14,354.18
6. Step 6: Final answer
   x = 11,011.89