Finding the Fourth Proportional to 9,780.51, 14,662.86 and 3,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,780.51 : 14,662.86 = 3,931.50 : x
2. Step 2: Convert to fraction form
   9,780.51/14,662.86 = 3,931.50/x
3. Step 3: Cross multiply
   9,780.51x = 14,662.86 × 3,931.50
4. Step 4: Simplify right side
   9,780.51x = 57,647,034.09
5. Step 5: Solve for x
   x = 57,647,034.09/9,780.51
6. Step 6: Final answer
   x = 5,894.07