Finding the Fourth Proportional to 9,861.75, 14,792.49 and 3,619.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.75 : 14,792.49 = 3,619.31 : x
2. Step 2: Convert to fraction form
   9,861.75/14,792.49 = 3,619.31/x
3. Step 3: Cross multiply
   9,861.75x = 14,792.49 × 3,619.31
4. Step 4: Simplify right side
   9,861.75x = 53,538,675.87
5. Step 5: Solve for x
   x = 53,538,675.87/9,861.75
6. Step 6: Final answer
   x = 5,428.92