Finding the Fourth Proportional to 9,886.76, 13,643.95 and 5,410.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,886.76 : 13,643.95 = 5,410.51 : x
2. Step 2: Convert to fraction form
   9,886.76/13,643.95 = 5,410.51/x
3. Step 3: Cross multiply
   9,886.76x = 13,643.95 × 5,410.51
4. Step 4: Simplify right side
   9,886.76x = 73,820,700.86
5. Step 5: Solve for x
   x = 73,820,700.86/9,886.76
6. Step 6: Final answer
   x = 7,466.62