Finding the Fourth Proportional to 9,886.95, 13,643.86 and 5,410.65

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.95 : 13,643.86 = 5,410.65 : x
2. Step 2: Convert to fraction form
   9,886.95/13,643.86 = 5,410.65/x
3. Step 3: Cross multiply
   9,886.95x = 13,643.86 × 5,410.65
4. Step 4: Simplify right side
   9,886.95x = 73,822,151.11
5. Step 5: Solve for x
   x = 73,822,151.11/9,886.95
6. Step 6: Final answer
   x = 7,466.63