Finding the Fourth Proportional to 10,436.60, 14,401.85 and 5,720.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.60 : 14,401.85 = 5,720.91 : x
2. Step 2: Convert to fraction form
   10,436.60/14,401.85 = 5,720.91/x
3. Step 3: Cross multiply
   10,436.60x = 14,401.85 × 5,720.91
4. Step 4: Simplify right side
   10,436.60x = 82,391,659.08
5. Step 5: Solve for x
   x = 82,391,659.08/10,436.60
6. Step 6: Final answer
   x = 7,894.50