Finding the Fourth Proportional to 6,429.51, 8,870.85 and 4,071.06

Step by Step Solution

1. Step 1: Write the proportion equation
   6,429.51 : 8,870.85 = 4,071.06 : x
2. Step 2: Convert to fraction form
   6,429.51/8,870.85 = 4,071.06/x
3. Step 3: Cross multiply
   6,429.51x = 8,870.85 × 4,071.06
4. Step 4: Simplify right side
   6,429.51x = 36,113,762.60
5. Step 5: Solve for x
   x = 36,113,762.60/6,429.51
6. Step 6: Final answer
   x = 5,616.88