Finding the Fourth Proportional to 1,573.72, 2,171.72 and 875.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.72 : 2,171.72 = 875.08 : x
2. Step 2: Convert to fraction form
   1,573.72/2,171.72 = 875.08/x
3. Step 3: Cross multiply
   1,573.72x = 2,171.72 × 875.08
4. Step 4: Simplify right side
   1,573.72x = 1,900,428.74
5. Step 5: Solve for x
   x = 1,900,428.74/1,573.72
6. Step 6: Final answer
   x = 1,207.60