Finding the Fourth Proportional to 10,645.50, 15,968.52 and 3,720

Step by Step Solution

1. Step 1: Write the proportion equation
   10,645.50 : 15,968.52 = 3,720 : x
2. Step 2: Convert to fraction form
   10,645.50/15,968.52 = 3,720/x
3. Step 3: Cross multiply
   10,645.50x = 15,968.52 × 3,720
4. Step 4: Simplify right side
   10,645.50x = 59,402,894.40
5. Step 5: Solve for x
   x = 59,402,894.40/10,645.50
6. Step 6: Final answer
   x = 5,580.09