Finding the Fourth Proportional to 1,755.42, 2,421.27 and 1,288.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,755.42 : 2,421.27 = 1,288.86 : x
2. Step 2: Convert to fraction form
   1,755.42/2,421.27 = 1,288.86/x
3. Step 3: Cross multiply
   1,755.42x = 2,421.27 × 1,288.86
4. Step 4: Simplify right side
   1,755.42x = 3,120,678.05
5. Step 5: Solve for x
   x = 3,120,678.05/1,755.42
6. Step 6: Final answer
   x = 1,777.74