Finding the Fourth Proportional to 13,250.77, 19,876.15 and 3,390.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,250.77 : 19,876.15 = 3,390.03 : x
2. Step 2: Convert to fraction form
   13,250.77/19,876.15 = 3,390.03/x
3. Step 3: Cross multiply
   13,250.77x = 19,876.15 × 3,390.03
4. Step 4: Simplify right side
   13,250.77x = 67,380,744.78
5. Step 5: Solve for x
   x = 67,380,744.78/13,250.77
6. Step 6: Final answer
   x = 5,085.04