Finding the Fourth Proportional to 12,946.79, 17,869.88 and 7,643.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,946.79 : 17,869.88 = 7,643.32 : x
2. Step 2: Convert to fraction form
   12,946.79/17,869.88 = 7,643.32/x
3. Step 3: Cross multiply
   12,946.79x = 17,869.88 × 7,643.32
4. Step 4: Simplify right side
   12,946.79x = 136,585,185.64
5. Step 5: Solve for x
   x = 136,585,185.64/12,946.79
6. Step 6: Final answer
   x = 10,549.73