Finding the Fourth Proportional to 2,097.60, 2,891.76 and 1,311.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.60 : 2,891.76 = 1,311.12 : x
2. Step 2: Convert to fraction form
   2,097.60/2,891.76 = 1,311.12/x
3. Step 3: Cross multiply
   2,097.60x = 2,891.76 × 1,311.12
4. Step 4: Simplify right side
   2,097.60x = 3,791,444.37
5. Step 5: Solve for x
   x = 3,791,444.37/2,097.60
6. Step 6: Final answer
   x = 1,807.52