Finding the Fourth Proportional to 1,760.86, 2,642.20 and 1,277.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.86 : 2,642.20 = 1,277.89 : x
2. Step 2: Convert to fraction form
   1,760.86/2,642.20 = 1,277.89/x
3. Step 3: Cross multiply
   1,760.86x = 2,642.20 × 1,277.89
4. Step 4: Simplify right side
   1,760.86x = 3,376,440.96
5. Step 5: Solve for x
   x = 3,376,440.96/1,760.86
6. Step 6: Final answer
   x = 1,917.50