Finding the Fourth Proportional to 10,436.90, 14,402.61 and 5,721.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,436.90 : 14,402.61 = 5,721.02 : x
2. Step 2: Convert to fraction form
   10,436.90/14,402.61 = 5,721.02/x
3. Step 3: Cross multiply
   10,436.90x = 14,402.61 × 5,721.02
4. Step 4: Simplify right side
   10,436.90x = 82,397,619.86
5. Step 5: Solve for x
   x = 82,397,619.86/10,436.90
6. Step 6: Final answer
   x = 7,894.84