Finding the Fourth Proportional to 13,300.18, 19,950.23 and 3,439.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,300.18 : 19,950.23 = 3,439.40 : x
2. Step 2: Convert to fraction form
   13,300.18/19,950.23 = 3,439.40/x
3. Step 3: Cross multiply
   13,300.18x = 19,950.23 × 3,439.40
4. Step 4: Simplify right side
   13,300.18x = 68,616,729.91
5. Step 5: Solve for x
   x = 68,616,729.91/13,300.18
6. Step 6: Final answer
   x = 5,159.08