Finding the Fourth Proportional to 7,643.30, 10,547.72 and 4,286.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,643.30 : 10,547.72 = 4,286.10 : x
2. Step 2: Convert to fraction form
   7,643.30/10,547.72 = 4,286.10/x
3. Step 3: Cross multiply
   7,643.30x = 10,547.72 × 4,286.10
4. Step 4: Simplify right side
   7,643.30x = 45,208,602.06
5. Step 5: Solve for x
   x = 45,208,602.06/7,643.30
6. Step 6: Final answer
   x = 5,914.80