Finding the Fourth Proportional to 9,861.34, 14,791.51 and 3,620.87

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.34 : 14,791.51 = 3,620.87 : x
2. Step 2: Convert to fraction form
   9,861.34/14,791.51 = 3,620.87/x
3. Step 3: Cross multiply
   9,861.34x = 14,791.51 × 3,620.87
4. Step 4: Simplify right side
   9,861.34x = 53,558,167.98
5. Step 5: Solve for x
   x = 53,558,167.98/9,861.34
6. Step 6: Final answer
   x = 5,431.12