Finding the Fourth Proportional to 1,402.52, 1,933.94 and 1,288.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.52 : 1,933.94 = 1,288.58 : x
2. Step 2: Convert to fraction form
   1,402.52/1,933.94 = 1,288.58/x
3. Step 3: Cross multiply
   1,402.52x = 1,933.94 × 1,288.58
4. Step 4: Simplify right side
   1,402.52x = 2,492,029.96
5. Step 5: Solve for x
   x = 2,492,029.96/1,402.52
6. Step 6: Final answer
   x = 1,776.83