Finding the Fourth Proportional to 12,123.90, 18,185.28 and 3,802.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.90 : 18,185.28 = 3,802.62 : x
2. Step 2: Convert to fraction form
   12,123.90/18,185.28 = 3,802.62/x
3. Step 3: Cross multiply
   12,123.90x = 18,185.28 × 3,802.62
4. Step 4: Simplify right side
   12,123.90x = 69,151,709.43
5. Step 5: Solve for x
   x = 69,151,709.43/12,123.90
6. Step 6: Final answer
   x = 5,703.75