Finding the Fourth Proportional to 14,518.56, 21,780.72 and 4,130.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,518.56 : 21,780.72 = 4,130.72 : x
2. Step 2: Convert to fraction form
   14,518.56/21,780.72 = 4,130.72/x
3. Step 3: Cross multiply
   14,518.56x = 21,780.72 × 4,130.72
4. Step 4: Simplify right side
   14,518.56x = 89,970,055.72
5. Step 5: Solve for x
   x = 89,970,055.72/14,518.56
6. Step 6: Final answer
   x = 6,196.90