Finding the Fourth Proportional to 2,970.81, 4,459.86 and 2,817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,970.81 : 4,459.86 = 2,817.72 : x
2. Step 2: Convert to fraction form
   2,970.81/4,459.86 = 2,817.72/x
3. Step 3: Cross multiply
   2,970.81x = 4,459.86 × 2,817.72
4. Step 4: Simplify right side
   2,970.81x = 12,566,636.72
5. Step 5: Solve for x
   x = 12,566,636.72/2,970.81
6. Step 6: Final answer
   x = 4,230.04