Finding the Fourth Proportional to 8,965.30, 13,449.15 and 3,123.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,965.30 : 13,449.15 = 3,123.70 : x
2. Step 2: Convert to fraction form
   8,965.30/13,449.15 = 3,123.70/x
3. Step 3: Cross multiply
   8,965.30x = 13,449.15 × 3,123.70
4. Step 4: Simplify right side
   8,965.30x = 42,011,109.86
5. Step 5: Solve for x
   x = 42,011,109.86/8,965.30
6. Step 6: Final answer
   x = 4,685.97