Finding the Fourth Proportional to 13,189.10, 19,782.86 and 3,328.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,189.10 : 19,782.86 = 3,328.34 : x
2. Step 2: Convert to fraction form
   13,189.10/19,782.86 = 3,328.34/x
3. Step 3: Cross multiply
   13,189.10x = 19,782.86 × 3,328.34
4. Step 4: Simplify right side
   13,189.10x = 65,844,084.25
5. Step 5: Solve for x
   x = 65,844,084.25/13,189.10
6. Step 6: Final answer
   x = 4,992.31