Finding the Fourth Proportional to 1,713.72, 2,570.18 and 788.70

Step by Step Solution

1. Step 1: Write the proportion equation
   1,713.72 : 2,570.18 = 788.70 : x
2. Step 2: Convert to fraction form
   1,713.72/2,570.18 = 788.70/x
3. Step 3: Cross multiply
   1,713.72x = 2,570.18 × 788.70
4. Step 4: Simplify right side
   1,713.72x = 2,027,097.02
5. Step 5: Solve for x
   x = 2,027,097.02/1,713.72
6. Step 6: Final answer
   x = 1,182.86