Finding the Fourth Proportional to 10,980.16, 15,147.32 and 10,555.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,980.16 : 15,147.32 = 10,555.84 : x
2. Step 2: Convert to fraction form
   10,980.16/15,147.32 = 10,555.84/x
3. Step 3: Cross multiply
   10,980.16x = 15,147.32 × 10,555.84
4. Step 4: Simplify right side
   10,980.16x = 159,892,686.35
5. Step 5: Solve for x
   x = 159,892,686.35/10,980.16
6. Step 6: Final answer
   x = 14,561.96