Finding the Fourth Proportional to 1,715.04, 2,570.24 and 788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,715.04 : 2,570.24 = 788.56 : x
2. Step 2: Convert to fraction form
   1,715.04/2,570.24 = 788.56/x
3. Step 3: Cross multiply
   1,715.04x = 2,570.24 × 788.56
4. Step 4: Simplify right side
   1,715.04x = 2,026,788.45
5. Step 5: Solve for x
   x = 2,026,788.45/1,715.04
6. Step 6: Final answer
   x = 1,181.77