Finding the Fourth Proportional to 10,914.65, 15,058.71 and 6,439.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,914.65 : 15,058.71 = 6,439.91 : x
2. Step 2: Convert to fraction form
   10,914.65/15,058.71 = 6,439.91/x
3. Step 3: Cross multiply
   10,914.65x = 15,058.71 × 6,439.91
4. Step 4: Simplify right side
   10,914.65x = 96,976,661.82
5. Step 5: Solve for x
   x = 96,976,661.82/10,914.65
6. Step 6: Final answer
   x = 8,885.00