Finding the Fourth Proportional to 12,139.36, 18,209.06 and 3,374.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.36 : 18,209.06 = 3,374.32 : x
2. Step 2: Convert to fraction form
   12,139.36/18,209.06 = 3,374.32/x
3. Step 3: Cross multiply
   12,139.36x = 18,209.06 × 3,374.32
4. Step 4: Simplify right side
   12,139.36x = 61,443,195.34
5. Step 5: Solve for x
   x = 61,443,195.34/12,139.36
6. Step 6: Final answer
   x = 5,061.49