Finding the Fourth Proportional to 1,915.50, 2,875.68 and 1,628.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.50 : 2,875.68 = 1,628.76 : x
2. Step 2: Convert to fraction form
   1,915.50/2,875.68 = 1,628.76/x
3. Step 3: Cross multiply
   1,915.50x = 2,875.68 × 1,628.76
4. Step 4: Simplify right side
   1,915.50x = 4,683,770.03
5. Step 5: Solve for x
   x = 4,683,770.03/1,915.50
6. Step 6: Final answer
   x = 2,445.20