Finding the Fourth Proportional to 2,003.76, 3,007.44 and 1,312.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.76 : 3,007.44 = 1,312.56 : x
2. Step 2: Convert to fraction form
   2,003.76/3,007.44 = 1,312.56/x
3. Step 3: Cross multiply
   2,003.76x = 3,007.44 × 1,312.56
4. Step 4: Simplify right side
   2,003.76x = 3,947,445.45
5. Step 5: Solve for x
   x = 3,947,445.45/2,003.76
6. Step 6: Final answer
   x = 1,970.02