Finding the Fourth Proportional to 10,436.58, 14,402.39 and 5,720.85

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.58 : 14,402.39 = 5,720.85 : x
2. Step 2: Convert to fraction form
   10,436.58/14,402.39 = 5,720.85/x
3. Step 3: Cross multiply
   10,436.58x = 14,402.39 × 5,720.85
4. Step 4: Simplify right side
   10,436.58x = 82,393,840.82
5. Step 5: Solve for x
   x = 82,393,840.82/10,436.58
6. Step 6: Final answer
   x = 7,894.72