Finding the Fourth Proportional to 1,945.02, 2,915.60 and 1,680.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.02 : 2,915.60 = 1,680.43 : x
2. Step 2: Convert to fraction form
   1,945.02/2,915.60 = 1,680.43/x
3. Step 3: Cross multiply
   1,945.02x = 2,915.60 × 1,680.43
4. Step 4: Simplify right side
   1,945.02x = 4,899,451.48
5. Step 5: Solve for x
   x = 4,899,451.48/1,945.02
6. Step 6: Final answer
   x = 2,518.97