Finding the Fourth Proportional to 2,127.90, 2,935.62 and 1,287.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.90 : 2,935.62 = 1,287.84 : x
2. Step 2: Convert to fraction form
   2,127.90/2,935.62 = 1,287.84/x
3. Step 3: Cross multiply
   2,127.90x = 2,935.62 × 1,287.84
4. Step 4: Simplify right side
   2,127.90x = 3,780,608.86
5. Step 5: Solve for x
   x = 3,780,608.86/2,127.90
6. Step 6: Final answer
   x = 1,776.69