Finding the Fourth Proportional to 1,870.74, 2,806.71 and 896.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,806.71 = 896.91 : x
2. Step 2: Convert to fraction form
   1,870.74/2,806.71 = 896.91/x
3. Step 3: Cross multiply
   1,870.74x = 2,806.71 × 896.91
4. Step 4: Simplify right side
   1,870.74x = 2,517,366.27
5. Step 5: Solve for x
   x = 2,517,366.27/1,870.74
6. Step 6: Final answer
   x = 1,345.65