Finding the Fourth Proportional to 1,915.56, 2,871.72 and 875.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,915.56 : 2,871.72 = 875.19 : x
2. Step 2: Convert to fraction form
   1,915.56/2,871.72 = 875.19/x
3. Step 3: Cross multiply
   1,915.56x = 2,871.72 × 875.19
4. Step 4: Simplify right side
   1,915.56x = 2,513,300.63
5. Step 5: Solve for x
   x = 2,513,300.63/1,915.56
6. Step 6: Final answer
   x = 1,312.04