Finding the Fourth Proportional to 1,164.32, 1,605.14 and 790.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.32 : 1,605.14 = 790.72 : x
2. Step 2: Convert to fraction form
   1,164.32/1,605.14 = 790.72/x
3. Step 3: Cross multiply
   1,164.32x = 1,605.14 × 790.72
4. Step 4: Simplify right side
   1,164.32x = 1,269,216.30
5. Step 5: Solve for x
   x = 1,269,216.30/1,164.32
6. Step 6: Final answer
   x = 1,090.09