Finding the Fourth Proportional to 8,685.96, 12,970.35 and 8,594.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,685.96 : 12,970.35 = 8,594.40 : x
2. Step 2: Convert to fraction form
   8,685.96/12,970.35 = 8,594.40/x
3. Step 3: Cross multiply
   8,685.96x = 12,970.35 × 8,594.40
4. Step 4: Simplify right side
   8,685.96x = 111,472,376.04
5. Step 5: Solve for x
   x = 111,472,376.04/8,685.96
6. Step 6: Final answer
   x = 12,833.63