Finding the Fourth Proportional to 11,448.63, 15,680.70 and 10,776.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,448.63 : 15,680.70 = 10,776.15 : x
2. Step 2: Convert to fraction form
   11,448.63/15,680.70 = 10,776.15/x
3. Step 3: Cross multiply
   11,448.63x = 15,680.70 × 10,776.15
4. Step 4: Simplify right side
   11,448.63x = 168,977,575.31
5. Step 5: Solve for x
   x = 168,977,575.31/11,448.63
6. Step 6: Final answer
   x = 14,759.63