Finding the Fourth Proportional to 10,436.16, 14,402.08 and 5,720.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.16 : 14,402.08 = 5,720.40 : x
2. Step 2: Convert to fraction form
   10,436.16/14,402.08 = 5,720.40/x
3. Step 3: Cross multiply
   10,436.16x = 14,402.08 × 5,720.40
4. Step 4: Simplify right side
   10,436.16x = 82,385,658.43
5. Step 5: Solve for x
   x = 82,385,658.43/10,436.16
6. Step 6: Final answer
   x = 7,894.25