Finding the Fourth Proportional to 2,955.34, 4,428.82 and 1,639.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,955.34 : 4,428.82 = 1,639.67 : x
2. Step 2: Convert to fraction form
   2,955.34/4,428.82 = 1,639.67/x
3. Step 3: Cross multiply
   2,955.34x = 4,428.82 × 1,639.67
4. Step 4: Simplify right side
   2,955.34x = 7,261,803.29
5. Step 5: Solve for x
   x = 7,261,803.29/2,955.34
6. Step 6: Final answer
   x = 2,457.18