Finding the Fourth Proportional to 6,429.42, 8,873.55 and 4,071.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.42 : 8,873.55 = 4,071.78 : x
2. Step 2: Convert to fraction form
   6,429.42/8,873.55 = 4,071.78/x
3. Step 3: Cross multiply
   6,429.42x = 8,873.55 × 4,071.78
4. Step 4: Simplify right side
   6,429.42x = 36,131,143.42
5. Step 5: Solve for x
   x = 36,131,143.42/6,429.42
6. Step 6: Final answer
   x = 5,619.66