Finding the Fourth Proportional to 1,131.02, 1,697.68 and 783.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.02 : 1,697.68 = 783.15 : x
2. Step 2: Convert to fraction form
   1,131.02/1,697.68 = 783.15/x
3. Step 3: Cross multiply
   1,131.02x = 1,697.68 × 783.15
4. Step 4: Simplify right side
   1,131.02x = 1,329,537.85
5. Step 5: Solve for x
   x = 1,329,537.85/1,131.02
6. Step 6: Final answer
   x = 1,175.52