Finding the Fourth Proportional to 1,575.89, 2,174.49 and 912.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.89 : 2,174.49 = 912.61 : x
2. Step 2: Convert to fraction form
   1,575.89/2,174.49 = 912.61/x
3. Step 3: Cross multiply
   1,575.89x = 2,174.49 × 912.61
4. Step 4: Simplify right side
   1,575.89x = 1,984,461.32
5. Step 5: Solve for x
   x = 1,984,461.32/1,575.89
6. Step 6: Final answer
   x = 1,259.26