Finding the Fourth Proportional to 1,709.89, 2,566.05 and 931.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,709.89 : 2,566.05 = 931.48 : x
2. Step 2: Convert to fraction form
   1,709.89/2,566.05 = 931.48/x
3. Step 3: Cross multiply
   1,709.89x = 2,566.05 × 931.48
4. Step 4: Simplify right side
   1,709.89x = 2,390,224.25
5. Step 5: Solve for x
   x = 2,390,224.25/1,709.89
6. Step 6: Final answer
   x = 1,397.88