Finding the Fourth Proportional to 1,400.80, 1,931.84 and 1,165.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.80 : 1,931.84 = 1,165.52 : x
2. Step 2: Convert to fraction form
   1,400.80/1,931.84 = 1,165.52/x
3. Step 3: Cross multiply
   1,400.80x = 1,931.84 × 1,165.52
4. Step 4: Simplify right side
   1,400.80x = 2,251,599.89
5. Step 5: Solve for x
   x = 2,251,599.89/1,400.80
6. Step 6: Final answer
   x = 1,607.37