Finding the Fourth Proportional to 9,429.58, 14,140.72 and 3,187.92

Step by Step Solution

1. Step 1: Write the proportion equation
   9,429.58 : 14,140.72 = 3,187.92 : x
2. Step 2: Convert to fraction form
   9,429.58/14,140.72 = 3,187.92/x
3. Step 3: Cross multiply
   9,429.58x = 14,140.72 × 3,187.92
4. Step 4: Simplify right side
   9,429.58x = 45,079,484.10
5. Step 5: Solve for x
   x = 45,079,484.10/9,429.58
6. Step 6: Final answer
   x = 4,780.65