Finding the Fourth Proportional to 1,715.83, 2,570.31 and 790.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.83 : 2,570.31 = 790.12 : x
2. Step 2: Convert to fraction form
   1,715.83/2,570.31 = 790.12/x
3. Step 3: Cross multiply
   1,715.83x = 2,570.31 × 790.12
4. Step 4: Simplify right side
   1,715.83x = 2,030,853.34
5. Step 5: Solve for x
   x = 2,030,853.34/1,715.83
6. Step 6: Final answer
   x = 1,183.60