Finding the Fourth Proportional to 11,619.32, 16,026.55 and 7,639.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,619.32 : 16,026.55 = 7,639.16 : x
2. Step 2: Convert to fraction form
   11,619.32/16,026.55 = 7,639.16/x
3. Step 3: Cross multiply
   11,619.32x = 16,026.55 × 7,639.16
4. Step 4: Simplify right side
   11,619.32x = 122,429,280.47
5. Step 5: Solve for x
   x = 122,429,280.47/11,619.32
6. Step 6: Final answer
   x = 10,536.70