Finding the Fourth Proportional to 2,870.56, 4,305.68 and 924.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.56 : 4,305.68 = 924.16 : x
2. Step 2: Convert to fraction form
   2,870.56/4,305.68 = 924.16/x
3. Step 3: Cross multiply
   2,870.56x = 4,305.68 × 924.16
4. Step 4: Simplify right side
   2,870.56x = 3,979,137.23
5. Step 5: Solve for x
   x = 3,979,137.23/2,870.56
6. Step 6: Final answer
   x = 1,386.19