Finding the Fourth Proportional to 8,966.90, 13,450.25 and 3,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,966.90 : 13,450.25 = 3,123.50 : x
2. Step 2: Convert to fraction form
   8,966.90/13,450.25 = 3,123.50/x
3. Step 3: Cross multiply
   8,966.90x = 13,450.25 × 3,123.50
4. Step 4: Simplify right side
   8,966.90x = 42,011,796.43
5. Step 5: Solve for x
   x = 42,011,796.43/8,966.90
6. Step 6: Final answer
   x = 4,685.21