Finding the Fourth Proportional to 1,880.72, 2,819.16 and 1,047.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,880.72 : 2,819.16 = 1,047.92 : x
2. Step 2: Convert to fraction form
   1,880.72/2,819.16 = 1,047.92/x
3. Step 3: Cross multiply
   1,880.72x = 2,819.16 × 1,047.92
4. Step 4: Simplify right side
   1,880.72x = 2,954,254.15
5. Step 5: Solve for x
   x = 2,954,254.15/1,880.72
6. Step 6: Final answer
   x = 1,570.81