Finding the Fourth Proportional to 9,714.77, 14,568.51 and 3,139.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,714.77 : 14,568.51 = 3,139.19 : x
2. Step 2: Convert to fraction form
   9,714.77/14,568.51 = 3,139.19/x
3. Step 3: Cross multiply
   9,714.77x = 14,568.51 × 3,139.19
4. Step 4: Simplify right side
   9,714.77x = 45,733,320.91
5. Step 5: Solve for x
   x = 45,733,320.91/9,714.77
6. Step 6: Final answer
   x = 4,707.61