Finding the Fourth Proportional to 1,913.31, 2,870.42 and 1,036.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,913.31 : 2,870.42 = 1,036.69 : x
2. Step 2: Convert to fraction form
   1,913.31/2,870.42 = 1,036.69/x
3. Step 3: Cross multiply
   1,913.31x = 2,870.42 × 1,036.69
4. Step 4: Simplify right side
   1,913.31x = 2,975,735.71
5. Step 5: Solve for x
   x = 2,975,735.71/1,913.31
6. Step 6: Final answer
   x = 1,555.28